Intent of record_worker_in_new_namespace, record_worker_in_existing_namespace

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
    
    workers/ 3 tests
    
    TestRegistryImpl_RecordWorkerHeartbeat/ 3 tests
    
    go.temporal.io/server/service/matching/workers/TestRegistryImpl_RecordWorkerHeartbeat/record_worker_in_existing_namespace Introduced here
    
    go.temporal.io/server/service/matching/workers/TestRegistryImpl_RecordWorkerHeartbeat/record_worker_in_new_namespace Introduced here
    
    go.temporal.io/server/service/matching/workers/TestRegistryImpl_RecordWorkerHeartbeat/update_existing_worker Inherited registry_impl.go ×1