Auto-labeling actions for pull requests (#6117)

.github/workflows/labeler-needsreview.yml

@@ -0,0 +1,16 @@
+name: "Labels: Review"
+
+on:
+  pull_request_target:
+    types: [review_requested]
+
+jobs:
+  add_label:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions-ecosystem/action-add-labels@v1
+      with:
+        labels: "Status: Needs Review"
+    - uses: actions-ecosystem/action-remove-labels@v1
+      with:
+        labels: "Status: Awaiting Changes"

.github/workflows/labeler-pr.yml

@@ -0,0 +1,12 @@
+name: "Labels: PR"
+
+on:
+- pull_request_target
+
+jobs:
+  labeler:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/labeler@v3
+      with:
+        repo-token: "${{ secrets.GITHUB_TOKEN }}"