Only run "design approved" check when necessary

.github/workflows/trigger-merge-checks.yml

@@ -0,0 +1,29 @@
+name: Trigger Merge Checks
+
+on:
+  pull_request:
+    branches: [ master ]
+    types: [synchronize, opened, reopened, labeled, unlabeled]
+
+permissions:
+  statuses: write
+
+jobs:
+  check-design-approved:
+    name: Check Design Approved Status
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check design approved status and update check
+        run: |
+          set -x pipefail
+          status_state="pending"
+          if ${{ contains(github.event.*.labels.*.name, 'design-approved') }}; then
+            status_state="success"
+          fi
+          curl -sSL --fail-with-body \
+            -X POST \
+            -H "Accept: application/vnd.github+json" \
+            -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            "https://api.github.com/repos/$GITHUB_REPOSITORY/statuses/${{ github.event.pull_request.head.sha }}" \
+            -d '{"context":"Design Approved Check","state":"'"$status_state"'"}'