Intent of TestSpecIntervalBasic

All 8 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 8 tests
- server/ 8 tests
  - service/ 8 tests
    
    worker/ 8 tests
    
    scheduler/ 8 tests
    
    TestSpec/ 8 tests
    
    go.temporal.io/server/service/worker/scheduler/TestSpec/TestExcludeAll Inherited TestExcludeAll
    
    go.temporal.io/server/service/worker/scheduler/TestSpec/TestSpecBoundedJitter Inherited TestSpecBoundedJitter, TestSpecStartTimeMinusOneSecond
    
    go.temporal.io/server/service/worker/scheduler/TestSpec/TestSpecEndTime Inherited TestSpecEndTime
    
    go.temporal.io/server/service/worker/scheduler/TestSpec/TestSpecExclude Inherited TestSpecExclude
    
    go.temporal.io/server/service/worker/scheduler/TestSpec/TestSpecIntervalBasic Introduced here
    
    go.temporal.io/server/service/worker/scheduler/TestSpec/TestSpecJitterSeed Inherited TestSpecJitterSeed
    
    go.temporal.io/server/service/worker/scheduler/TestSpec/TestSpecStartTime Inherited TestSpecStartTime
    
    go.temporal.io/server/service/worker/scheduler/TestSpec/TestSpecStartTimeMinusOneSecond Inherited TestSpecBoundedJitter, TestSpecStartTimeMinusOneSecond