Intent of task_name_must_not_be_empty

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
    
    TestRegistryTestSuite/ 1 test
    
    TestRegistry_RegisterTasks_Error/ 1 test
    
    go.temporal.io/server/chasm/TestRegistryTestSuite/TestRegistry_RegisterTasks_Error/task_name_must_not_be_empty Introduced here