-11730] [State Backends] Make HeapKeyedStateBackend follow the
builder pattern
This closes #7866.
(cherry picked from commit 237d07c76b51c171f0f41f9f82d777df26da1dd4)
---
.../KVStateRequestSerializerRocksDBTest.java | 5 +-
.../network/KvStateRequestSerializerTest.java
] [State Backends] Make HeapKeyedStateBackend follow the
builder pattern
This closes #7866.
---
.../KVStateRequestSerializerRocksDBTest.java | 5 +-
.../network/KvStateRequestSerializerTest.java | 57 +--
.../flink/runtime/state/AbstractStateBackend.java | 9 +
.../flink