[testing workflows] Update concurrency group for CI workflow (#50407)

.github/workflows/ci.yml

@@ -16,8 +16,9 @@ on:
         type: string
 
 concurrency:
-  group: '${{ github.workflow }}-${{ github.ref }}-${{ inputs.trigger }}'
-  cancel-in-progress: ${{ github.ref != 'trunk' }}
+  # Cancel concurrent jobs but not for push event. For push use the run_id to have a unique group.
+  group: ci-${{ github.event_name == 'push' && github.run_id || github.event_name }}-${{ github.ref }}-${{ inputs.trigger }}
+  cancel-in-progress: true
 
 env:
   FORCE_COLOR: 1