Add workflow to remove statuses after approve

.github/workflows/labeler-approve.yml

@@ -0,0 +1,16 @@
+name: "Labels: Approve"
+
+on:
+  pull_request_target:
+    types: [submitted]
+
+jobs:
+  remove_label:
+    if: github.event.review.state == 'approved'
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions-ecosystem/action-remove-labels@v1
+      with:
+        labels: |
+          Status: Needs Review
+          Status: Awaiting Changes