feat(ci): kill duplicate CI jobs on PRs (#26945)

.github/workflows/pre-commit.yml

@@ -7,6 +7,11 @@ on:
   pull_request:
     types: [synchronize, opened, reopened, ready_for_review]
 
+# cancel previous workflow jobs for PRs
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   pre-commit:
     runs-on: ubuntu-20.04