ci: Add watchdog

Signed-off-by: Oliver Koenig <okoenig@nvidia.com>

.github/workflows/_watchdog.yaml

@@ -0,0 +1,43 @@
+name: watchdog
+
+on:
+  issue_comment:
+    types: [created]
+
+jobs:
+  woof:
+    runs-on: ubuntu-22.04
+    if: >
+      github.event_name == 'issue_comment' &&
+      github.event.issue.pull_request &&
+      startsWith(github.event.comment.body, '/ci')
+    steps:
+      - name: Get PR number
+        shell: bash
+        id: get-pr-num
+        run: |
+          PR_URL="${{ github.event.issue.pull_request.url }}"
+          PR_NUM=${PR_URL##*/}
+          echo "pr_number=$PR_NUM" >> $GITHUB_OUTPUT
+
+      - name: Get Pull Request Information
+        uses: actions/github-script@v6
+        id: get-pr-branch
+        with:
+          result-encoding: string
+          script: |
+            const pr = await github.rest.pulls.get({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              pull_number: ${{ steps.get-pr-num.outputs.pr_number }}
+            });
+            console.log('Pull Request Information:', pr.data);
+            return pr.data.head.ref;
+
+      - name: Workflow Dispatch and wait              
+        uses: aurelien-baudet/workflow-dispatch@v2.1.1
+        with:
+          workflow: "CI"
+          token: ${{ secrets.TOKEN }}
+          wait-for-completion: false
+          ref: ${{ steps.get-pr-branch.outputs.result }}