Intent of query_returns_requested_namespace_only

All 2 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 2 tests
- server/ 2 tests
  - service/ 2 tests
    
    matching/ 2 tests
    
    workers/ 2 tests
    
    TestRegistryImpl_ListWorkersWithQuery/ 2 tests
    
    go.temporal.io/server/service/matching/workers/TestRegistryImpl_ListWorkersWithQuery/query_returns_requested_namespace_only Introduced here
    
    go.temporal.io/server/service/matching/workers/TestRegistryImpl_ListWorkersWithQuery/valid_compound_query_-_multiple_conditions Inherited valid_compound_query_-_multiple_conditions