Intent of TestUpdateShardInfo_PersistsAfterInterval_RegardlessOfTasksCompleted, TestUpdateShardInfo_OnlyPersistsAfterInterval_WhenTaskCheckingDisabled

All 3 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 3 tests
- server/ 3 tests
  - service/ 3 tests
    
    history/ 3 tests
    
    shard/ 3 tests
    
    TestShardContextSuite/ 3 tests
    
    go.temporal.io/server/service/history/shard/TestShardContextSuite/TestUpdateShardInfo_FirstUpdate Inherited TestUpdateShardInfo_FirstUpdate
    
    go.temporal.io/server/service/history/shard/TestShardContextSuite/TestUpdateShardInfo_OnlyPersistsAfterInterval_WhenTaskCheckingDisabled Introduced here
    
    go.temporal.io/server/service/history/shard/TestShardContextSuite/TestUpdateShardInfo_PersistsAfterInterval_RegardlessOfTasksCompleted Introduced here