update the multi-approver workflow

Author: Neelabh94

.github/workflows/multi-approvers.yml

@@ -32,6 +32,39 @@ concurrency:
 jobs:
   multi-approvers:
     if: github.event_name == 'pull_request_review' && (github.event.review.state == 'approved' ||  github.event.action == 'dismissed')
-    uses: 'abcxyz/pkg/.github/workflows/multi-approvers.yml@main'
-    with:
-      org-members-path: 'GoogleCloudPlatform/cluster-toolkit/develop/cluster-toolkit-writers.json'
+    runs-on: 'ubuntu-latest'
+    steps:
+    - name: 'Authenticate to Google Cloud'
+      id: 'minty-auth'
+      uses: 'google-github-actions/auth@6fc4af4b145ae7821d527454aa9bd537d1f2dc5f' # ratchet:google-github-actions/auth@v2
+      with:
+        create_credentials_file: false
+        export_environment_variables: false
+        workload_identity_provider: '${{ vars.TOKEN_MINTER_WIF_PROVIDER }}'
+        service_account: '${{ vars.TOKEN_MINTER_WIF_SERVICE_ACCOUNT }}'
+        token_format: 'id_token'
+        id_token_audience: '${{ vars.TOKEN_MINTER_SERVICE_AUDIENCE }}'
+        id_token_include_email: true
+
+    - name: 'Mint Token'
+      id: 'minty'
+      uses: 'abcxyz/github-token-minter/.github/actions/minty@main' # ratchet:exclude
+      with:
+        id_token: '${{ steps.minty-auth.outputs.id_token }}'
+        service_url: '${{ vars.TOKEN_MINTER_SERVICE_URL }}'
+        requested_permissions: |-
+          {
+            "scope": "multi-approvers-action",
+            "repositories": ["cluster-toolkit"],
+            "permissions": {
+              "actions": "write",
+              "members": "read",
+              "pull_requests": "read"
+            }
+          }
+
+    - name: 'Multi-approvers'
+      uses: 'abcxyz/actions/.github/actions/multi-approvers'
+      with:
+        team: 'hpc-toolkit'
+        token: '${{ steps.minty.outputs.token }}'