Remove redundant google-github-actions/auth steps from self-hosted PR workflows (#40378)

Author: damccorm

.github/workflows/beam_PostCommit_Java_ValidatesRunner_Dataflow_V2_Streaming.yml

@@ -78,11 +78,6 @@ jobs:
         uses: ./.github/actions/setup-environment-action
         with:
           java-version: default
-      - name: Authenticate to GCP
-        uses: google-github-actions/auth@7c6bc770dae815cd3e89ee6cdf493a5fab2cc093
-        with:
-          service_account: ${{ secrets.GCP_SA_EMAIL }}
-          credentials_json: ${{ secrets.GCP_SA_KEY }}
       - name: Set up Cloud SDK
         uses: google-github-actions/setup-gcloud@aa5489c8933f4cc7a4f7d45035b3b1440c9c10db
       - name: run validatesRunnerV2Streaming script

.github/workflows/beam_PostCommit_Python_Arm.yml

@@ -89,11 +89,6 @@ jobs:
         run: |
           sudo curl -L https://github.com/docker/compose/releases/download/1.22.0/docker-compose-$(uname -s)-$(uname -m) -o /usr/local/bin/docker-compose
           sudo chmod +x /usr/local/bin/docker-compose
-      - name: Authenticate on GCP
-        uses: google-github-actions/auth@7c6bc770dae815cd3e89ee6cdf493a5fab2cc093
-        with:
-          service_account: ${{ secrets.GCP_SA_EMAIL }}
-          credentials_json: ${{ secrets.GCP_SA_KEY }}
       - name: Set up Cloud SDK
         uses: google-github-actions/setup-gcloud@aa5489c8933f4cc7a4f7d45035b3b1440c9c10db
       # aarch64 wheels are built with cibuildwheel on this x86 runner.

.github/workflows/beam_PostCommit_Python_ValidatesContainer_Dataflow.yml

@@ -81,11 +81,6 @@ jobs:
         with:
           java-version: default
           python-version: ${{ matrix.python_version }}
-      - name: Authenticate to GCP
-        uses: google-github-actions/auth@7c6bc770dae815cd3e89ee6cdf493a5fab2cc093
-        with:
-          service_account: ${{ secrets.GCP_SA_EMAIL }}
-          credentials_json: ${{ secrets.GCP_SA_KEY }}
       - name: Set up Cloud SDK
         uses: google-github-actions/setup-gcloud@aa5489c8933f4cc7a4f7d45035b3b1440c9c10db
       - name: Configure Docker auth for GCR

.github/workflows/beam_PostCommit_Python_ValidatesContainer_Dataflow_With_RC.yml

@@ -83,11 +83,6 @@ jobs:
         with:
           java-version: default
           python-version: ${{ matrix.python_version }}
-      - name: Authenticate to GCP
-        uses: google-github-actions/auth@7c6bc770dae815cd3e89ee6cdf493a5fab2cc093
-        with:
-          service_account: ${{ secrets.GCP_SA_EMAIL }}
-          credentials_json: ${{ secrets.GCP_SA_KEY }}
       - name: Set up Cloud SDK
         uses: google-github-actions/setup-gcloud@aa5489c8933f4cc7a4f7d45035b3b1440c9c10db
       - name: Set PY_VER_CLEAN

.github/workflows/beam_PreCommit_Website_Stage_GCS.yml

@@ -89,17 +89,11 @@ jobs:
         with:
           python-version: default
           java-version: default
-      - name: Authenticate on GCP
-        id: auth-gcp
-        uses: google-github-actions/auth@7c6bc770dae815cd3e89ee6cdf493a5fab2cc093
-        with:
-          service_account: ${{ secrets.GCP_SA_EMAIL }}
-          credentials_json: ${{ secrets.GCP_SA_KEY }}
       - name: Run website_stageWebsite script
         uses: ./.github/actions/gradle-command-self-hosted-action
         with:
           gradle-command: :website:stageWebsite
-          arguments: -PwebsiteBucket=$gcsbucket -PgcpCredsFile="${{ steps.auth-gcp.outputs.credentials_file_path }}"
+          arguments: -PwebsiteBucket=$gcsbucket
       - name: Add website link to the summary if pr
         if: env.ghprbPullId != null
         run: echo "Website published to http://$gcsbucket.storage.googleapis.com/$ghprbPullId/index.html" >> $GITHUB_STEP_SUMMARY