Build/Test Tools: Don’t send a Slack notice when a workflow fails once.

[53947] introduced a callable workflow that allowed a workflow run to be retried automatic. By default all workflows are retried once.

Since a run is not considered “failed” until after the automatic retry, the first Slack message is unnecessary and can cause a lot of noise when there are network hiccups.

This alters the logic to skip a failure notice in Slack until the second failure.

See #58867.

git-svn-id: https://develop.svn.wordpress.org/trunk@56404 602fd350-edb4-49c9-b593-d223f7449a82

.github/workflows/slack-notifications.yml

@@ -71,6 +71,11 @@ jobs:
               run_id: ${{ github.run_id }},
             });
 
+            // All workflows will restart once when a failure is encountered. Don't notify Slack on the first failure.
+            if ( '${{ inputs.calling_status }}' == 'failure' && workflow_run.data.run_attempt == 1 ) {
+              return 'first-failure';
+            }
+
             // When a workflow has been restarted to fix a failure, check the previous run attempt.
             if ( workflow_run.data.run_attempt > 1 ) {
               const previous_run = await github.rest.actions.getWorkflowRunAttempt({
@@ -157,7 +162,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     needs: [ prepare ]
-    if: ${{ inputs.calling_status == 'failure' || failure() }}
+    if: ${{ ( inputs.calling_status == 'failure' || failure() ) && steps.previous-attempt-result.outputs.result != 'first-failure' }}
 
     steps:
       - name: Post failure notifications to Slack