Move to environment for approvals

.github/workflows/test-pr.yml

@@ -18,23 +18,16 @@ jobs:
       - name: PR must be from a branch in the stackhpc/ansible-collection-azimuth-ops repo
         run: exit ${{ github.repository == 'stackhpc/ansible-collection-azimuth-ops' && '0' || '1' }}
 
-  # Because of resource constraints, we want to restrict concurrency:
-  #
-  #   * Only one active workflow run at a time across all branches, others should be queued
-  #   * New workflow runs should cancel any in-progress runs for the same branch only
-  #
-  # The GitHub native concurrency cannot express this, so we use a custom action to queue
-  # This will wait for an available slot until the action times out or is cancelled
-  wait_in_queue:
+  # Use a job that does nothing but is protected by an environment as a guard
+  wait_for_approval:
     needs: [fail_on_remote]
-    if: ${{ !github.event.pull_request.draft }}
     runs-on: ubuntu-latest
+    environment: ci-approval
     steps:
-      - name: Wait for an available slot
-        uses: stackhpc/github-actions/workflow-concurrency@master
+      - run: exit 0
 
   run_azimuth_tests:
-    needs: [wait_in_queue]
+    needs: [wait_for_approval]
     runs-on: ubuntu-latest
     steps:
       # Check out the configuration repository