Intent of empty_registry_has_no_messages_to_send

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
    
    api/ 1 test
    
    respondworkflowtaskcompleted/ 1 test
    
    TestWorkflowTaskCompletedHandlerSuite/ 1 test
    
    TestUpdateWorkflow/ 1 test
    
    go.temporal.io/server/service/history/api/respondworkflowtaskcompleted/TestWorkflowTaskCompletedHandlerSuite/TestUpdateWorkflow/GetHistory_failed Inherited api.go ×2
    
    workflow/ 2 tests
    
    update/ 2 tests
    
    TestSendMessages/ 2 tests
    
    go.temporal.io/server/service/history/workflow/update/TestSendMessages/empty_registry_has_no_messages_to_send Introduced here
    
    go.temporal.io/server/service/history/workflow/update/TestSendMessages/registry_with_2_created_updates_has_no_messages_to_send Inherited registry.go ×2