Intent of metrics.go ×3

All 5 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 5 tests
- server/ 5 tests
  - service/ 5 tests
    
    history/ 5 tests
    
    replication/ 5 tests
    
    TestStreamReceiverSuite/ 2 tests
    
    go.temporal.io/server/service/history/replication/TestStreamReceiverSuite/TestProcessMessage_TrackSubmit_SingleStack Inherited TestProcessMessage_TrackSubmit_SingleStack
    
    go.temporal.io/server/service/history/replication/TestStreamReceiverSuite/TestProcessMessage_TrackSubmit_TieredStack Inherited stream_receiver.go ×5
    
    TestStreamSenderSuite/ 3 tests
    
    go.temporal.io/server/service/history/replication/TestStreamSenderSuite/TestSendTasks_TieredStack_HighPriority Inherited TestSendTasks_TieredStack_HighPriority
    
    go.temporal.io/server/service/history/replication/TestStreamSenderSuite/TestSendTasks_TieredStack_LowPriority Inherited stream_sender.go ×3
    
    go.temporal.io/server/service/history/replication/TestStreamSenderSuite/TestSendTasks_WithTasks Inherited stream_sender.go ×3