Intent of delay_is_zero, archival_enabled, +3

All 5 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 5 tests
- server/ 5 tests
  - service/ 5 tests
    
    history/ 5 tests
    
    workflow/ 5 tests
    
    TestTaskGeneratorImpl_GenerateWorkflowCloseTasks/ 5 tests
    
    go.temporal.io/server/service/history/workflow/TestTaskGeneratorImpl_GenerateWorkflowCloseTasks/archival_enabled Introduced here
    
    go.temporal.io/server/service/history/workflow/TestTaskGeneratorImpl_GenerateWorkflowCloseTasks/delay_exceeds_retention Introduced here
    
    go.temporal.io/server/service/history/workflow/TestTaskGeneratorImpl_GenerateWorkflowCloseTasks/delay_is_less_than_retention Introduced here
    
    go.temporal.io/server/service/history/workflow/TestTaskGeneratorImpl_GenerateWorkflowCloseTasks/delay_is_zero Introduced here
    
    go.temporal.io/server/service/history/workflow/TestTaskGeneratorImpl_GenerateWorkflowCloseTasks/visibility_archival_disabled Introduced here