Intent of Buffer_cleared_when_the_workflow_task_times_out

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
    
    api/ 1 test
    
    respondworkflowtaskcompleted/ 1 test
    
    TestWorkflowTaskCompletedHandlerSuite/ 1 test
    
    TestWorkflowTaskCompletionPagination/ 1 test
    
    go.temporal.io/server/service/history/api/respondworkflowtaskcompleted/TestWorkflowTaskCompletedHandlerSuite/TestWorkflowTaskCompletionPagination/Buffer_cleared_when_the_workflow_task_times_out Introduced here