This commit migrate EnumValueSerializer to use new serialization compatibilty abstractions
  * add a new class `ScalaEnumSerializerSnapshot`
  * return a `ScalaEnumSerializerConfigSnapshot ` with `ScalaEnumSerializerSnapshot` when calling `EnumValueSerializer#snapshotConfiguration`
  * add a migration test `EnumValueSerializerSnapshotMigrationTest` to test the compatibility
  * remove function `EnumValueSerializer#ensureCompatibility()`