Intent of override_all_defaults

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
    
    history/ 2 tests
    
    api/ 2 tests
    
    TestCommandAttrValidatorSuite/ 2 tests
    
    TestValidateActivityRetryPolicy/ 2 tests
    
    go.temporal.io/server/service/history/api/TestCommandAttrValidatorSuite/TestValidateActivityRetryPolicy/override_all_defaults Introduced here
    
    go.temporal.io/server/service/history/api/TestCommandAttrValidatorSuite/TestValidateActivityRetryPolicy/override_non-set_policy Inherited override_non-set_policy