Bump google-github-actions/auth from 1 to 2

Bumps [google-github-actions/auth](https://github.com/google-github-actions/auth) from 1 to 2.
- [Release notes](https://github.com/google-github-actions/auth/releases)
- [Changelog](https://github.com/google-github-actions/auth/blob/main/CHANGELOG.md)
- [Commits](google-github-actions/auth@v1...v2)

---
updated-dependencies:
- dependency-name: google-github-actions/auth
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/iac.yml

@@ -107,7 +107,7 @@ jobs:
 
       - id: 'auth'
         name: 'Authenticate to Google Cloud'
-        uses: 'google-github-actions/auth@v1'
+        uses: 'google-github-actions/auth@v2'
         if: inputs.GCP_ENV == true
         with:
           workload_identity_provider: ${{ secrets.GCP_WIP }}