Intent of when_max_attempts_is_set_to_0_should_keep_trying

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
  - service/ 1 test
    
    history/ 1 test
    
    workflow/ 1 test
    
    Test_nextBackoffInterval/ 1 test
    
    go.temporal.io/server/service/history/workflow/Test_nextBackoffInterval/when_max_attempts_is_set_to_0_should_keep_trying Introduced here