Intent of empty_data_blob, unknown_encoding_type

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
  - common/ 8 tests
    
    persistence/ 8 tests
    
    serialization/ 2 tests
    
    TestProtoDecode/ 2 tests
    
    go.temporal.io/server/common/persistence/serialization/TestProtoDecode/empty_data_blob Introduced here
    
    go.temporal.io/server/common/persistence/serialization/TestProtoDecode/unknown_encoding_type Introduced here
    
    tests/ 6 tests
    
    TestCassandraQueueV2Persistence/ 1 test
    
    Generic/ 1 test
    
    HistoryTaskQueueManagerImpl/ 1 test
    
    TestHistoryTQMErrDeserializeTask/ 1 test
    
    go.temporal.io/server/common/persistence/tests/TestCassandraQueueV2Persistence/Generic/HistoryTaskQueueManagerImpl/TestHistoryTQMErrDeserializeTask/empty_blob Inherited empty_blob
    
    TestMySQLQueueV2/ 1 test
    
    Generic/ 1 test
    
    HistoryTaskQueueManagerImpl/ 1 test
    
    TestHistoryTQMErrDeserializeTask/ 1 test
    
    go.temporal.io/server/common/persistence/tests/TestMySQLQueueV2/Generic/HistoryTaskQueueManagerImpl/TestHistoryTQMErrDeserializeTask/empty_blob Inherited empty_blob
    
    TestPGX/ 1 test
    
    TestPGQueueV2/ 1 test
    
    Generic/ 1 test
    
    HistoryTaskQueueManagerImpl/ 1 test
    
    TestHistoryTQMErrDeserializeTask/ 1 test
    
    go.temporal.io/server/common/persistence/tests/TestPGX/TestPGQueueV2/Generic/HistoryTaskQueueManagerImpl/TestHistoryTQMErrDeserializeTask/empty_blob Inherited empty_blob
    
    TestPGXSP/ 1 test
    
    TestPGQueueV2/ 1 test
    
    Generic/ 1 test
    
    HistoryTaskQueueManagerImpl/ 1 test
    
    TestHistoryTQMErrDeserializeTask/ 1 test
    
    go.temporal.io/server/common/persistence/tests/TestPGXSP/TestPGQueueV2/Generic/HistoryTaskQueueManagerImpl/TestHistoryTQMErrDeserializeTask/empty_blob Inherited empty_blob
    
    TestPQ/ 1 test
    
    TestPGQueueV2/ 1 test
    
    Generic/ 1 test
    
    HistoryTaskQueueManagerImpl/ 1 test
    
    TestHistoryTQMErrDeserializeTask/ 1 test
    
    go.temporal.io/server/common/persistence/tests/TestPQ/TestPGQueueV2/Generic/HistoryTaskQueueManagerImpl/TestHistoryTQMErrDeserializeTask/empty_blob Inherited empty_blob
    
    TestSQLiteQueueV2/ 1 test
    
    Generic/ 1 test
    
    HistoryTaskQueueManagerImpl/ 1 test
    
    TestHistoryTQMErrDeserializeTask/ 1 test
    
    go.temporal.io/server/common/persistence/tests/TestSQLiteQueueV2/Generic/HistoryTaskQueueManagerImpl/TestHistoryTQMErrDeserializeTask/empty_blob Inherited empty_blob