Intent of handler.go ×4

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
    
    matching/ 3 tests
    
    TestNexusHandlersEmitClientNameMetric/ 3 tests
    
    go.temporal.io/server/service/matching/TestNexusHandlersEmitClientNameMetric/PollNexusTaskQueue Inherited PollNexusTaskQueue
    
    go.temporal.io/server/service/matching/TestNexusHandlersEmitClientNameMetric/is_internal_for_worker_commands_task_queue_kind Inherited task_queues.go ×1
    
    go.temporal.io/server/service/matching/TestNexusHandlersEmitClientNameMetric/no_client_name_when_header_absent Inherited tags.go ×1