Intent of TestHandleErr_RandomErr

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
    
    history/ 8 tests
    
    queues/ 8 tests
    
    TestExecutableSuite/ 8 tests
    
    TestExecuteHandleErr_ResetAttempt/ 1 test
    
    go.temporal.io/server/service/history/queues/TestExecutableSuite/TestExecuteHandleErr_ResetAttempt/no_failover Inherited no_failover
    
    TestExecute_InMemoryNoUserLatency_SingleAttempt/ 1 test
    
    go.temporal.io/server/service/history/queues/TestExecutableSuite/TestExecute_InMemoryNoUserLatency_SingleAttempt/UnavailableError Inherited UnavailableError
    
    go.temporal.io/server/service/history/queues/TestExecutableSuite/TestExecute_DLQFailThenRetry Inherited dlq_writer.go ×1
    
    go.temporal.io/server/service/history/queues/TestExecutableSuite/TestExecute_DontSendToDLQAfterMaxAttemptsDLQDisabled Inherited TestExecute_SendToDLQErrPatternEmptyString, TestExecute_DontSendToDLQAfterMaxAttemptsDLQDisabled
    
    go.temporal.io/server/service/history/queues/TestExecutableSuite/TestExecute_InMemoryNoUserLatency_MultipleAttempts Inherited TestExecute_InMemoryNoUserLatency_MultipleAttempts
    
    go.temporal.io/server/service/history/queues/TestExecutableSuite/TestExecute_SendToDLQAfterMaxAttempts Inherited TestExecute_SendToDLQAfterMaxAttempts
    
    go.temporal.io/server/service/history/queues/TestExecutableSuite/TestExecute_SendToDLQErrPatternEmptyString Inherited TestExecute_SendToDLQErrPatternEmptyString, TestExecute_DontSendToDLQAfterMaxAttemptsDLQDisabled
    
    go.temporal.io/server/service/history/queues/TestExecutableSuite/TestHandleErr_RandomErr Introduced here