refactor(triggers): rename triggerWorkflow to onFailureWorkflow for clarity

- Updated all instances of `triggerWorkflow` to `onFailureWorkflow` across the codebase to improve clarity and consistency in naming.
- Adjusted related logic in workflow configurations and UI components to reflect the new naming convention.
- Enhanced error messages and documentation to align with the updated terminology.

This change aims to provide a clearer understanding of the workflow's failure handling mechanism.

packages/server/src/api/workflows.js

@@ -28,7 +28,7 @@ function triggerSummary(owner, workflow) {
       path: isHttp && t?.path != null ? namespacedPath(owner, t.path) : t?.path ?? null,
       schedule: t?.schedule ?? null,
       onConsecutiveFailures: t?.onConsecutiveFailures ?? null,
-      triggerWorkflow: t?.triggerWorkflow ?? null,
+      onFailureWorkflow: t?.onFailureWorkflow ?? null,
       auth: isHttp ? authLabel(t?.auth) : null,
     };
   });