Intent of When_RequestCancelExternalWorkflowExecutionFailedEvent_added_it_will_be_placed_in_MemBuffer, When_RequestCancelExternalWorkflowExecutionFailedEvent_added_it_will_be_placed_in_MemBuffer

All 4 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 4 tests
- server/ 4 tests
  - service/ 4 tests
    
    history/ 4 tests
    
    TestTransferQueueActiveTaskExecutorSuite/ 2 tests
    
    go.temporal.io/server/service/history/TestTransferQueueActiveTaskExecutorSuite/TestProcessCancelExecution_Failure Inherited transfer_queue_active_task_executor.go ×3
    
    go.temporal.io/server/service/history/TestTransferQueueActiveTaskExecutorSuite/TestProcessCancelExecution_Failure_TargetNamespaceNotFound Inherited transfer_queue_active_task_executor.go ×1
    
    historybuilder/ 2 tests
    
    TestHistoryBuilder_AddDifferentEvents/ 1 test
    
    go.temporal.io/server/service/history/historybuilder/TestHistoryBuilder_AddDifferentEvents/When_RequestCancelExternalWorkflowExecutionFailedEvent_added_it_will_be_placed_in_MemBuffer Introduced here
    
    TestHistoryBuilder_AddDifferentEvents_WorkflowFinishEvents/ 1 test
    
    go.temporal.io/server/service/history/historybuilder/TestHistoryBuilder_AddDifferentEvents_WorkflowFinishEvents/When_RequestCancelExternalWorkflowExecutionFailedEvent_added_it_will_be_placed_in_MemBuffer Introduced here