Intent of TestTransition_Possible

All 4 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 4 tests
- server/ 4 tests
  - service/ 4 tests
    
    history/ 4 tests
    
    hsm/ 4 tests
    
    go.temporal.io/server/service/history/hsm/TestTransition_HandlerError Inherited TestTransition_HandlerError, TestTransition_ValidTransition
    
    go.temporal.io/server/service/history/hsm/TestTransition_InvalidTransition Inherited TestTransition_InvalidTransition
    
    go.temporal.io/server/service/history/hsm/TestTransition_Possible Introduced here
    
    go.temporal.io/server/service/history/hsm/TestTransition_ValidTransition Inherited TestTransition_HandlerError, TestTransition_ValidTransition