Intent of activity_backoff,_<_clause,_match, activity_backoff,_<_clause,_not_match

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
    
    workflow/ 2 tests
    
    matcher/ 2 tests
    
    TestActivityInfoMatchEvaluator_BackoffInterval/ 2 tests
    
    go.temporal.io/server/service/history/workflow/matcher/TestActivityInfoMatchEvaluator_BackoffInterval/activity_backoff,_<_clause,_match Introduced here
    
    go.temporal.io/server/service/history/workflow/matcher/TestActivityInfoMatchEvaluator_BackoffInterval/activity_backoff,_<_clause,_not_match Introduced here