ci: enable windows-cmake on free runners (#16181)

Author: scotthart

.github/workflows/test-runner.yml

@@ -104,8 +104,6 @@ jobs:
       execute-integration-tests: true
     secrets: inherit
   windows-cmake:
-    # Disabled
-    if: false
     name: Windows-CMake
     needs: [pre-flight]
     uses: ./.github/workflows/windows-cmake.yml