Unify and move serialization logic to common module or package

In many places around Drill we rely on custom SerDes. However, there seems some redundancy. For instance, Transient/PersistentStore(introduced by DRILL-4275) relies on InstanceSerializer whereas Controller uses CustomSerDe interface. Effectively these two are the same. We need to unify use cases, possibly moving SerDe logic to common module or some level up in the exec module.