Intent of metadata.go ×4

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
  - client/ 1 test
    
    history/ 1 test
    
    TestMetadataSuite/ 1 test
    
    go.temporal.io/server/client/history/TestMetadataSuite/TestClusterShardMD_Encode_Decode Introduced here
  - service/ 2 tests
    
    frontend/ 2 tests
    
    TestAdminHandlerSuite/ 2 tests
    
    go.temporal.io/server/service/frontend/TestAdminHandlerSuite/TestStreamWorkflowReplicationMessages_ClientToServerBroken Inherited service_grpc.pb.mock.go ×9
    
    go.temporal.io/server/service/frontend/TestAdminHandlerSuite/TestStreamWorkflowReplicationMessages_ServerToClientBroken Inherited service_grpc.pb.mock.go ×3