Intent of IS_NOT_NULL_AND_equality,_both_match

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
  - service/ 1 test
    
    matching/ 1 test
    
    workers/ 1 test
    
    TestWorkerQueryEngine_IsNullComposite/ 1 test
    
    go.temporal.io/server/service/matching/workers/TestWorkerQueryEngine_IsNullComposite/IS_NOT_NULL_AND_equality,_both_match Introduced here