[8.x] Fixes Failing test: Jest Integration Tests.x-pack/plugins/task_…

…manager/server/integration_tests - unrecognized task types should be no workload aggregator errors when there are removed task types (#196179) (#196217)

# Backport

This will backport the following commits from `main` to `8.x`:
- [Fixes Failing test: Jest Integration
Tests.x-pack/plugins/task_manager/server/integration_tests -
unrecognized task types should be no workload aggregator errors when
there are removed task types
(#196179)](#196179)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

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Co-authored-by: Ying Mao <[email protected]>
Co-authored-by: Elastic Machine <[email protected]>

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

@@ -127,7 +127,9 @@ describe('unrecognized task types', () => {
     if (errorLogCalls) {
       // should be no workload aggregator errors
       for (const elog of errorLogCalls) {
-        expect(elog).not.toMatch(/^\[WorkloadAggregator\]: Error: Unsupported task type/i);
+        if (typeof elog === 'string') {
+          expect(elog).not.toMatch(/^\[WorkloadAggregator\]: Error: Unsupported task type/i);
+        }
       }
     }
   });