Intent of ignore_error_when_request_ID_is_the_same

All 1 exact test in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 1 test
- server/ 1 test
  - service/ 1 test
    
    history/ 1 test
    
    TestEngine2Suite/ 1 test
    
    TestStartWorkflowExecution_Dedup/ 1 test
    
    when_workflow_completed/ 1 test
    
    go.temporal.io/server/service/history/TestEngine2Suite/TestStartWorkflowExecution_Dedup/when_workflow_completed/ignore_error_when_request_ID_is_the_same Introduced here