Build/Test Tools: Automatically rerun a workflow the first time it fails.

There are several common reoccurring issues that sometimes cause GitHub Action workflows to fail (connection timeouts to WordPress.org or the Docker container registry, `npm install` failures, Chromium issues, etc.). Except when there are service level outages, most of these issues can be resolved by simply rerunning the workflow.

This introduces a new step within each of Core’s GitHub Action workflows that attempts to rerun the failed jobs within the workflow that encountered a failure if they are running for the first time. Since a workflow is not allowed to restart itself, a new `failed-workflow.yml` callable workflow is being introduced.

Other related adjustments in this changeset:
- The `actions/github-script` 3rd-party action is also now updated to the latest version (v6.2.0).
- A new secret, `GHA_WORKFLOW_DISPATCH`, has been introduced. This will replace the current one in use (`GHA_OLD_BRANCH_DISPATCH`) with a less specific name.

Props jorbin, desrosj.
Fixes #56407.

git-svn-id: https://develop.svn.wordpress.org/trunk@53947 602fd350-edb4-49c9-b593-d223f7449a82

.github/workflows/javascript-tests.yml

@@ -98,3 +98,32 @@ jobs:
       SLACK_GHA_CANCELLED_WEBHOOK: ${{ secrets.SLACK_GHA_CANCELLED_WEBHOOK }}
       SLACK_GHA_FIXED_WEBHOOK: ${{ secrets.SLACK_GHA_FIXED_WEBHOOK }}
       SLACK_GHA_FAILURE_WEBHOOK: ${{ secrets.SLACK_GHA_FAILURE_WEBHOOK }}
+
+  failed-workflow:
+    name: Failed workflow tasks
+    runs-on: ubuntu-latest
+    needs: [ test-js, slack-notifications ]
+    if: |
+      always() &&
+      github.repository == 'WordPress/wordpress-develop' &&
+      github.event_name != 'pull_request' &&
+      github.run_number < 2 &&
+      (
+        needs.test-js.result == 'cancelled' || needs.test-js.result == 'failure'
+      )
+
+    steps:
+      - name: Dispatch workflow run
+        uses: actions/github-script@c713e510dbd7d213d92d41b7a7805a986f4c5c66 # v6.2.0
+        with:
+          github-token: ${{ secrets.GHA_WORKFLOW_DISPATCH }}
+          script: |
+            github.rest.actions.createWorkflowDispatch({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              workflow_id: 'failed-workflow.yml',
+              ref: '${{ github.ref_name }}',
+              inputs: {
+                run_id: '${{ github.run_id }}'
+              }
+            });