Fixes Failing test: Jest Integration Tests.x-pack/plugins/task_manage…

…r/server/integration_tests - unrecognized task types should be no workload aggregator errors when there are removed task types (elastic#195496)

Resolves elastic#194208

## Summary

The original integration test was checking for the (non) existence of
any error logs on startup when there are removed task types, which was
not specific enough because there were occasionally error logs like

```
"Task SLO:ORPHAN_SUMMARIES-CLEANUP-TASK \"SLO:ORPHAN_SUMMARIES-CLEANUP-TASK:1.0.0\" failed: ResponseError: search_phase_execution_exception
```

so this PR updates the integration test to check specifically for
workload aggregator error logs

Co-authored-by: Elastic Machine <[email protected]>
(cherry picked from commit 742cd13)

x-pack/plugins/task_manager/server/integration_tests/removed_types.test.ts

@@ -121,7 +121,15 @@ describe('unrecognized task types', () => {
     // so we want to wait that long to let it refresh
     await new Promise((r) => setTimeout(r, 5100));
 
-    expect(errorLogSpy).not.toHaveBeenCalled();
+    const errorLogCalls = errorLogSpy.mock.calls[0];
+
+    // if there are any error logs, none of them should be workload aggregator errors
+    if (errorLogCalls) {
+      // should be no workload aggregator errors
+      for (const elog of errorLogCalls) {
+        expect(elog).not.toMatch(/^\[WorkloadAggregator\]: Error: Unsupported task type/i);
+      }
+    }
   });
 });