Intent of all_differing_fields_ignored

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
    
    testing/ 1 test
    
    protorequire/ 1 test
    
    TestProtoEqualIgnoreFields/ 1 test
    
    go.temporal.io/server/common/testing/protorequire/TestProtoEqualIgnoreFields/all_differing_fields_ignored Introduced here