Intent of returns_false_for_wrong_type_in_context

All 1 exact test in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 1 test
- server/ 1 test
  - common/ 1 test
    
    contextutil/ 1 test
    
    TestContextHasMetadata/ 1 test
    
    go.temporal.io/server/common/contextutil/TestContextHasMetadata/returns_false_for_wrong_type_in_context Introduced here