Intent of if_workflow_finished_should_clean_dbBufferBatch_and_memBufferBatch_and_exit

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
    
    historybuilder/ 1 test
    
    TestHistoryBuilder_FlushBufferToCurrentBatch/ 1 test
    
    go.temporal.io/server/service/history/historybuilder/TestHistoryBuilder_FlushBufferToCurrentBatch/if_workflow_finished_should_clean_dbBufferBatch_and_memBufferBatch_and_exit Introduced here