feat: auto-convert PR to draft on changes requested

Author: chrisburr

.github/workflows/draft-on-changes-requested.yml

@@ -0,0 +1,15 @@
+name: Draft on Changes Requested
+
+on:
+  workflow_run:
+    workflows: ["Record Changes Requested"]
+    types: [completed]
+
+permissions: {}
+
+jobs:
+  draft:
+    if: github.event.workflow_run.conclusion == 'success'
+    uses: DIRACGrid/management/.github/workflows/draft-on-changes-requested.yml@master
+    secrets:
+      token: ${{ secrets.DRAFT_PAT }}

.github/workflows/record-changes-requested.yml

@@ -0,0 +1,12 @@
+name: Record Changes Requested
+
+on:
+  pull_request_review:
+    types: [submitted]
+
+jobs:
+  record:
+    if: github.event.review.state == 'changes_requested'
+    runs-on: ubuntu-latest
+    steps:
+      - run: 'true'