Move CsWin32RunAsBuildTask to Directory.Build.targets

Relocate the CsWin32RunAsBuildTask property from Directory.Build.props to Directory.Build.targets (after DisableRuntimeMarshalling), grouping it with the other AOT/marshalling-related build settings. Both CsWin32 consumers (UnitTest and OOPExe) target net10.0, so the targets PropertyGroup's net10.0 gate still applies and the property continues to resolve to true.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Sergio0694

src/Directory.Build.props

@@ -119,13 +119,6 @@
       files aren't included. Once that issue is fixed, this should be restricted to published projects only.
     -->
     <GenerateDocumentationFile Condition="'$(IsPublicProject)' == 'true'">true</GenerateDocumentationFile>
-
-    <!--
-      Run the CsWin32 source generator as an MSBuild build task instead of an in-process Roslyn source
-      generator. This improves IntelliSense performance and lets CsWin32 generate trim-safe and AOT-safe
-      interop code. It's a no-op for projects that don't reference CsWin32.
-    -->
-    <CsWin32RunAsBuildTask>true</CsWin32RunAsBuildTask>
   </PropertyGroup>
 
   <!-- Set overrides to point to folder where they are built in solution -->

src/Directory.Build.targets

@@ -19,6 +19,13 @@
     <!-- Emit the [DisableRuntimeMarshalling] attribute (also enables the associated analyzer) -->
     <DisableRuntimeMarshalling>true</DisableRuntimeMarshalling>
 
+    <!--
+      Run the CsWin32 source generator as an MSBuild build task instead of an in-process Roslyn source
+      generator. This improves IntelliSense performance and lets CsWin32 generate trim-safe and AOT-safe
+      interop code. It's a no-op for projects that don't reference CsWin32.
+    -->
+    <CsWin32RunAsBuildTask>true</CsWin32RunAsBuildTask>
+
     <!--
       Emit the '[module: SkipLocalsInit]' attribute, to further reduce runtime overhead. This is especially useful when
       using 'stackalloc'. See: https://learn.microsoft.com/dotnet/api/system.runtime.compilerservices.skiplocalsinitattribute.