Intent of non_nil_maps

All 12 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 12 tests
- server/ 12 tests
  - chasm/ 2 tests
    
    lib/ 2 tests
    
    nexusoperation/ 1 test
    
    go.temporal.io/server/chasm/lib/nexusoperation/TestOperation_BuildExecutionInfo_ReturnsIsolatedSearchAttributes Inherited operation.go ×8
    
    scheduler/ 1 test
    
    go.temporal.io/server/chasm/lib/scheduler/TestScheduler_Describe_ReturnsIsolatedVisibilityMaps Inherited TestScheduler_Describe_ReturnsIsolatedVisibilityMaps
  - common/ 5 tests
    
    payload/ 5 tests
    
    TestMergeMapOfPayload/ 3 tests
    
    go.temporal.io/server/common/payload/TestMergeMapOfPayload/nil_map_merging_key_with_string_value Inherited nil_map_merging_key_with_string_value
    
    go.temporal.io/server/common/payload/TestMergeMapOfPayload/nil_payloads_are_filtered Inherited nil_payloads_are_filtered
    
    go.temporal.io/server/common/payload/TestMergeMapOfPayload/non_nil_maps Introduced here
    
    go.temporal.io/server/common/payload/TestFilterNilMemo Inherited payload.go ×1
    
    go.temporal.io/server/common/payload/TestFilterNilSearchAttributes Inherited TestFilterNilSearchAttributes
  - service/ 5 tests
    
    history/ 5 tests
    
    TestTransferQueueActiveTaskExecutorSuite/ 5 tests
    
    go.temporal.io/server/service/history/TestTransferQueueActiveTaskExecutorSuite/TestProcessSignalExecution_Duplication Inherited transfer_queue_active_task_executor.go ×1
    
    go.temporal.io/server/service/history/TestTransferQueueActiveTaskExecutorSuite/TestProcessSignalExecution_Failure_SignalCountLimitExceeded Inherited transfer_queue_active_task_executor.go ×1
    
    go.temporal.io/server/service/history/TestTransferQueueActiveTaskExecutorSuite/TestProcessSignalExecution_Failure_TargetNamespaceNotFound Inherited transfer_queue_active_task_executor.go ×1
    
    go.temporal.io/server/service/history/TestTransferQueueActiveTaskExecutorSuite/TestProcessSignalExecution_Failure_TargetWorkflowNotFound Inherited transfer_queue_active_task_executor.go ×1
    
    go.temporal.io/server/service/history/TestTransferQueueActiveTaskExecutorSuite/TestProcessSignalExecution_Success Inherited transfer_queue_active_task_executor.go ×5