Add a shared Windows Bazel setup action (#60010)

## What changed

Add `.github/actions/setup-bazel-windows` to prepare MSVC, derive the Bazel Windows path, download the pinned Cygwin snapshot, and run the existing verified Windows dependency bootstrap. Export the Windows system root and host architecture for subsequent steps.

Use the action in the Bazel workflow and argument-comment lint action. Remove an unused `EnvironmentAttachment` import from the session tests.

GitOrigin-RevId: 8dc711dc9301bb44d49be3fdab79bd4ca981b7d0

.github/actions/run-argument-comment-lint/action.yml

@@ -22,7 +22,7 @@ runs:
 
     - name: Prepare native Windows audio dependencies
       if: ${{ runner.os == 'Windows' }}
-      uses: ./third_party/voice/cargo-ci/windows-setup
+      uses: ./.github/actions/setup-bazel-windows
       with:
         target: x86_64-pc-windows-msvc
 

.github/actions/setup-bazel-windows/action.yml

@@ -0,0 +1,33 @@
+name: Set up Windows Bazel build tools
+description: Prepare MSVC and verified native dependencies for Windows Bazel builds.
+inputs:
+  target:
+    description: Native Windows target triple
+    required: true
+  windows-tools:
+    description: Directory containing the public Windows voice bootstrap
+    default: .github/scripts
+runs:
+  using: composite
+  steps:
+    - uses: ./.github/actions/setup-msvc-env
+      with:
+        target: ${{ inputs.target }}
+    - name: Install verified public Windows tools
+      shell: pwsh
+      env:
+        WINDOWS_TOOLS: ${{ inputs.windows-tools }}
+        TARGET: ${{ inputs.target }}
+      run: |
+        ./.github/scripts/compute-bazel-windows-path.ps1
+        $manifest = Get-Content -Raw "$env:WINDOWS_TOOLS/voice-cygwin-snapshot.json" | ConvertFrom-Json
+        $pin = $manifest.archive
+        $archive = Join-Path $env:RUNNER_TEMP $pin.name
+        Invoke-WebRequest "https://github.com/openai/codex/releases/download/$($pin.tag)/$($pin.name)" -OutFile $archive
+        & "$env:WINDOWS_TOOLS/setup-voice-windows.ps1" -Target $env:TARGET -SnapshotArchive $archive
+        if (-not $env:SystemRoot) { throw "Windows SystemRoot is required" }
+        "VOICE_WINDOWS_SYSTEM_ROOT=$env:SystemRoot" | Out-File $env:GITHUB_ENV -Encoding utf8 -Append
+        $hostArch = $env:PROCESSOR_ARCHITEW6432
+        if (-not $hostArch) { $hostArch = $env:PROCESSOR_ARCHITECTURE }
+        if (-not $hostArch) { throw "Windows host architecture is required" }
+        "VOICE_WINDOWS_HOST_ARCH=$hostArch" | Out-File $env:GITHUB_ENV -Encoding utf8 -Append

.github/workflows/bazel.yml

@@ -178,7 +178,7 @@ jobs:
 
       - name: Prepare native Windows audio dependencies
         if: runner.os == 'Windows'
-        uses: ./third_party/voice/cargo-ci/windows-setup
+        uses: ./.github/actions/setup-bazel-windows
         with:
           target: x86_64-pc-windows-msvc
 
@@ -282,7 +282,7 @@ jobs:
 
       - name: Prepare native Windows audio dependencies
         if: runner.os == 'Windows'
-        uses: ./third_party/voice/cargo-ci/windows-setup
+        uses: ./.github/actions/setup-bazel-windows
         with:
           target: x86_64-pc-windows-msvc
 
@@ -379,7 +379,7 @@ jobs:
 
       - name: Prepare native Windows audio dependencies
         if: runner.os == 'Windows'
-        uses: ./third_party/voice/cargo-ci/windows-setup
+        uses: ./.github/actions/setup-bazel-windows
         with:
           target: x86_64-pc-windows-msvc
 
@@ -480,7 +480,7 @@ jobs:
 
       - name: Prepare native Windows audio dependencies
         if: runner.os == 'Windows'
-        uses: ./third_party/voice/cargo-ci/windows-setup
+        uses: ./.github/actions/setup-bazel-windows
         with:
           target: x86_64-pc-windows-msvc