Intent of TestWait_LowPriority, TestWait_HighPriority

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
    
    replication/ 3 tests
    
    TestSenderFlowControllerSuite/ 3 tests
    
    go.temporal.io/server/service/history/replication/TestSenderFlowControllerSuite/TestPauseToResume Inherited stream_sender_flow_controller.go ×2
    
    go.temporal.io/server/service/history/replication/TestSenderFlowControllerSuite/TestWait_HighPriority Introduced here
    
    go.temporal.io/server/service/history/replication/TestSenderFlowControllerSuite/TestWait_LowPriority Introduced here