Re-add area-Host and area-System.Runtime.InteropServices labels (#126919)

## Description

Re-adds the `area-Host` and `area-System.Runtime.InteropServices` area
labels that were inadvertently removed from area-owners documentation
and policy bot automation.

**`docs/area-owners.md`**
- `area-Host` — lead: @agocke, owners: @elinor-fung
- `area-System.Runtime.InteropServices` — lead: @agocke, owners:
@dotnet/interop-contrib

**`.github/policies/resourceManagement.yml`**
- `labelAdded` trigger entries for both labels
- `hasLabel` notification blocks to tag area subscribers on new
issues/PRs

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
Co-authored-by: Julie Lee <63486087+JulieLeeMSFT@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: 4 people

.github/policies/resourceManagement.yml

@@ -172,6 +172,8 @@ configuration:
             label: area-GC-coreclr
         - labelAdded:
             label: area-GC-mono
+        - labelAdded:
+            label: area-Host
         - labelAdded:
             label: area-ILTools-coreclr
         - labelAdded:
@@ -296,6 +298,8 @@ configuration:
             label: area-System.Runtime
         - labelAdded:
             label: area-System.Runtime.CompilerServices
+        - labelAdded:
+            label: area-System.Runtime.InteropServices
         - labelAdded:
             label: area-System.Runtime.Intrinsics
         - labelAdded:
@@ -1413,6 +1417,18 @@ configuration:
               See info in [area-owners.md](https://github.com/dotnet/runtime/blob/main/docs/area-owners.md) if you want to be subscribed.
             assignMentionees: False
       - if:
+        - hasLabel:
+            label: area-System.Runtime.InteropServices
+        then:
+        - mentionUsers:
+            mentionees:
+            - dotnet/interop-contrib
+            replyTemplate: >-
+              Tagging subscribers to this area: ${mentionees}
+
+              See info in [area-owners.md](https://github.com/dotnet/runtime/blob/main/docs/area-owners.md) if you want to be subscribed.
+            assignMentionees: False
+      - if:
         - hasLabel:
             label: area-Interop-coreclr
         then:

docs/area-owners.md

@@ -41,6 +41,7 @@ Note: Editing this file doesn't update the mapping used by `@dotnet-policy-servi
 | area-Extensions-Primitives                     | @karelz              | @dotnet/area-extensions-primitives                                                       |                                                                                                                                                                                                                                                                                           |
 | area-GC-coreclr                                | @JulieLeeMSFT        | @dotnet/gc                                                                               |                                                                                                                                                                                                                                                                                           |
 | area-GC-mono                                   | @agocke              | @BrzVlad                                                                                 | @agocke to consult                                                                                                                                                                                                                                                                        |
+| area-Host                                      | @agocke              | @elinor-fung                                                                             | Issues with dotnet.exe including bootstrapping, framework detection, hostfxr.dll and hostpolicy.dll                                                                                                                                                                                       |
 | area-ILTools-coreclr                           | @JulieLeeMSFT        | @dotnet/jit-contrib                                                                      |                                                                                                                                                                                                                                                                                           |
 | area-Infrastructure                            | @agocke              | @dotnet/runtime-infrastructure                                                           | Consultants: @MichaelSimons                                                                                                                                                                                                                                                               |
 | area-Infrastructure-installer                  | @MichaelSimons       | @NikolaMilosavljevic                                                                     |                                                                                                                                                                                                                                                                                           |
@@ -115,6 +116,7 @@ Note: Editing this file doesn't update the mapping used by `@dotnet-policy-servi
 | area-System.Runtime                            | @jeffhandley         | @dotnet/area-system-runtime                                                              | Included:<ul><li>System.Runtime.Serialization.Formatters</li><li>System.Runtime.InteropServices.RuntimeInfo</li><li>System.Array</li></ul>Excluded:<ul><li>Path -> System.IO</li><li>StopWatch -> System.Diagnostics</li><li>Uri -> System.Net</li><li>WebUtility -> System.Net</li></ul> |
 | area-System.Runtime.Caching                    | @StephenMolloy       | @StephenMolloy @dotnet/Tellurium                                                         |                                                                                                                                                                                                                                                                                           |
 | area-System.Runtime.CompilerServices           | @jeffhandley         | @dotnet/area-system-runtime-compilerservices                                             |                                                                                                                                                                                                                                                                                           |
+| area-System.Runtime.InteropServices            | @agocke              | @dotnet/interop-contrib                                                                  | Excluded:<ul><li>System.Runtime.InteropServices.RuntimeInfo</li></ul>                                                                                                                                                                                                                     |
 | area-System.Runtime.InteropServices.JavaScript | @lewing              | @pavelsavara                                                                             |                                                                                                                                                                                                                                                                                           |
 | area-System.Runtime.Intrinsics                 | @jeffhandley         | @dotnet/area-system-runtime-intrinsics                                                   | Consultants: @echesakovMSFT @kunalspathak                                                                                                                                                                                                                                                 |
 | area-System.Security                           | @jeffhandley         | @bartonjs @vcsjones @dotnet/area-system-security                                         | Consultants: @GrabYourPitchforks @wfurt                                                                                                                                                                                                                                                   |