Intent of engine_mock.go ×2

All 3 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 3 tests
- server/ 3 tests
  - service/ 3 tests
    
    history/ 3 tests
    
    ndc/ 1 test
    
    TestWorkflowReplicatorSuite/ 1 test
    
    go.temporal.io/server/service/history/ndc/TestWorkflowReplicatorSuite/Test_ApplyWorkflowState_ExistWorkflow_SyncHSM Inherited workflow_state_replicator.go ×2
    
    replication/ 2 tests
    
    TestExecutableSyncHSMTaskSuite/ 2 tests
    
    go.temporal.io/server/service/history/replication/TestExecutableSyncHSMTaskSuite/TestExecute_Process Inherited message.pb.go ×2
    
    go.temporal.io/server/service/history/replication/TestExecutableSyncHSMTaskSuite/TestHandleErr_Resend_Success Inherited executable_sync_hsm_task.go ×1