Build/Test Tools: Increase the number of retries when restarting a workflow.

This increases the number of times to retry restarting a workflow from 10 to 15, and the `timeout-minutes` value to `30`.

For workflows with complex strategy matrix, the exponential backoff of 10 retries is still not enough to account for the GitHub Actions UI taking a long time to catch up.

Follow up to [56829] and [56830].
See #58867.

git-svn-id: https://develop.svn.wordpress.org/trunk@57052 602fd350-edb4-49c9-b593-d223f7449a82

.github/workflows/failed-workflow.yml

@@ -26,13 +26,13 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       actions: write
-    timeout-minutes: 20
+    timeout-minutes: 30
 
     steps:
       - name: Rerun a workflow
         uses: actions/github-script@d7906e4ad0b1822421a7e6a35d5ca353c962f410 # v6.4.1
         with:
-          retries: 10
+          retries: 15
           retry-exempt-status-codes: 418
           script: |
             const workflow_run = await github.rest.actions.getWorkflowRun({