Intent of filter_multiple_custom_search_attribute

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
    
    worker/ 2 tests
    
    scheduler/ 2 tests
    
    TestGetQueryFields/ 1 test
    
    go.temporal.io/server/service/worker/scheduler/TestGetQueryFields/filter_multiple_custom_search_attribute Introduced here
    
    TestValidateVisibilityQuery/ 1 test
    
    go.temporal.io/server/service/worker/scheduler/TestValidateVisibilityQuery/filter_multiple_custom_search_attribute Inherited filter_multiple_custom_search_attribute