Add support for Windows on ARM

Author: jakepetroules

.github/workflows/swift_package_test.yml

@@ -83,6 +83,10 @@ on:
         type: string
         description: "Exclude Windows Swift version list (JSON)"
         default: "[{\"swift_version\": \"\"}]"
+      windows_os_versions:
+        type: string
+        description: "Windows OS version label list (JSON)"
+        default: "[\"windows-2022\", \"windows-11-arm\"]"
       swift_flags:
         type: string
         description: "Swift flags for release version"
@@ -671,13 +675,24 @@ jobs:
           bash -s -- --android --flags="$BUILD_FLAGS" --build-command="${{ inputs.android_sdk_build_command }}" --android-sdk-triple=${{ join(fromJson(inputs.android_sdk_triples), ' --android-sdk-triple=') }} --android-ndk-version="${{ matrix.ndk_version }}" ${{ matrix.swift_version }}
 
   windows-build:
-    name: Windows (${{ matrix.swift_version }} - windows-2022)
+    name: Windows (${{ matrix.swift_version }} - ${{ matrix.os_version }})
     if: ${{ inputs.enable_windows_checks }}
-    runs-on: windows-2022
+    runs-on: ${{ matrix.os_version }}
     strategy:
       fail-fast: false
       matrix:
         swift_version: ${{ fromJson(inputs.windows_swift_versions) }}
+        os_version: ${{ fromJson(
+            inputs.enable_windows_docker
+              && format('[{0}]', join(
+                  fromJson(inputs.windows_os_versions)
+                    .*[
+                      startsWith('.', '') != '' || . != 'windows-11-arm'
+                    ],
+                  ','
+                ))
+              || inputs.windows_os_versions
+          ) }}
         exclude:
           - ${{ fromJson(inputs.windows_exclude_swift_versions) }}
     steps: