Intent of set_expected_max_interval_if_only_init_interval_set

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
  - service/ 3 tests
    
    history/ 3 tests
    
    api/ 3 tests
    
    TestCommandAttrValidatorSuite/ 3 tests
    
    TestValidateActivityRetryPolicy/ 3 tests
    
    go.temporal.io/server/service/history/api/TestCommandAttrValidatorSuite/TestValidateActivityRetryPolicy/override_all_defaults Inherited override_all_defaults
    
    go.temporal.io/server/service/history/api/TestCommandAttrValidatorSuite/TestValidateActivityRetryPolicy/override_non-set_policy Inherited override_non-set_policy
    
    go.temporal.io/server/service/history/api/TestCommandAttrValidatorSuite/TestValidateActivityRetryPolicy/set_expected_max_interval_if_only_init_interval_set Introduced here