Intent of held_open_via_paused

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
  - chasm/ 1 test
    
    lib/ 1 test
    
    scheduler/ 1 test
    
    TestIdleTask_Validate_MetricReasons/ 1 test
    
    go.temporal.io/server/chasm/lib/scheduler/TestIdleTask_Validate_MetricReasons/held_open_via_paused Introduced here