Move Bazel Windows jobs onto codex-runners (#24952)

The codex-windows runner group should be much faster than the default
GHA runners. Since bazel jobs on windows are frequently the long pole
for PRs checks, this will hopefully get people landing a bit faster.

.github/workflows/bazel.yml

@@ -141,7 +141,9 @@ jobs:
           - 2
           - 3
           - 4
-    runs-on: windows-latest
+    runs-on:
+      group: codex-runners
+      labels: codex-windows-x64
     name: Bazel test on windows-latest for x86_64-pc-windows-gnullvm shard ${{ matrix.shard }}/4
 
     steps:
@@ -246,7 +248,9 @@ jobs:
     # it a larger timeout.
     if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     timeout-minutes: 40
-    runs-on: windows-latest
+    runs-on:
+      group: codex-runners
+      labels: codex-windows-x64
     name: Bazel test on windows-latest for x86_64-pc-windows-gnullvm (native main)
 
     steps:
@@ -332,7 +336,10 @@ jobs:
             target: aarch64-apple-darwin
           - os: windows-latest
             target: x86_64-pc-windows-gnullvm
-    runs-on: ${{ matrix.os }}
+            runs_on:
+              group: codex-runners
+              labels: codex-windows-x64
+    runs-on: ${{ matrix.runs_on || matrix.os }}
     name: Bazel clippy on ${{ matrix.os }} for ${{ matrix.target }}
 
     steps:
@@ -422,7 +429,10 @@ jobs:
             target: aarch64-apple-darwin
           - os: windows-latest
             target: x86_64-pc-windows-gnullvm
-    runs-on: ${{ matrix.os }}
+            runs_on:
+              group: codex-runners
+              labels: codex-windows-x64
+    runs-on: ${{ matrix.runs_on || matrix.os }}
     name: Verify release build on ${{ matrix.os }} for ${{ matrix.target }}
 
     steps: