Intent of success_datetime_string

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
  - common/ 3 tests
    
    persistence/ 3 tests
    
    visibility/ 3 tests
    
    store/ 3 tests
    
    query/ 3 tests
    
    TestQueryConverter_ConvertComparisonExprStoreQueryConverterCalled/ 2 tests
    
    go.temporal.io/server/common/persistence/visibility/store/query/TestQueryConverter_ConvertComparisonExprStoreQueryConverterCalled/fail_datetime Inherited converter_mock.go ×2
    
    go.temporal.io/server/common/persistence/visibility/store/query/TestQueryConverter_ConvertComparisonExprStoreQueryConverterCalled/success_datetime Inherited converter_mock.go ×2
    
    TestQueryConverter_ValidateValueType/ 1 test
    
    go.temporal.io/server/common/persistence/visibility/store/query/TestQueryConverter_ValidateValueType/success_datetime_string Introduced here