Add path to bash to GITHUB_PATH (#5217)

* Add path to bash to GITHUB_PATH

This is a workaround for a problem that keeps reoccurring on one of our self-hosted machines.
Ideally, we should assume that bash shell is available on the runner system, and we should rely on the system-wise setting of PATH to find bash.

This commit is a workaround for a case where bash cannot be found from the runner machine, which shouldn't be a case in a normal situation. It is also not safe to assume that the location of where bash is at a fixed location, because it can vary by how the system is setup.
Once we root cause the issue on the SlangWin4-2, we may remove this workaround later.

.github/actions/common-setup/action.yml

@@ -16,6 +16,13 @@ inputs:
 runs:
  using: composite
  steps:
+ - name: Add bash to PATH
+ shell: pwsh
+ if: ${{inputs.os == 'windows'}}
+ run: |
+ Add-Content -Path $env:GITHUB_PATH -Value "C:\\Program Files\\Git\\bin"
+ Add-Content -Path $env:GITHUB_PATH -Value "C:\\Program Files\\Git\\usr\\bin"
+
  - name: Set up MSVC dev tools on Windows
  uses: ilammy/msvc-dev-cmd@v1
  with: