feat: configuring an extensible PR auto-labeler (#26880)

.github/workflows/label-migration-pr.yml

@@ -1,25 +0,0 @@
-name: Label Migration PR
-
-on:
-  pull_request:
-    paths:
-      - 'superset/migrations/**'
-
-jobs:
-  label:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-
-      - name: Add label
-        uses: actions/github-script@v3
-        with:
-          github-token: ${{github.token}}
-          script: |
-            github.issues.addLabels({
-                issue_number: context.issue.number,
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                labels: ['risk:db-migration']
-            })

.github/workflows/labeler.yml

@@ -0,0 +1,12 @@
+name: "Pull Request Labeler"
+on:
+- pull_request
+
+jobs:
+  labeler:
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/labeler@v5