As features have been added and changed along the way, the code behind supplying metadata (mainly PravegaTableDescriptionSupplier) has at this point become a bit winding and unwieldy.

The changes for this issue will simplify this code by cleaning up and abstracting some of the schema registry interactions (whether from an external schema registry like pravega/schema-registry or schemas stored on local disk)

Please refer to this wiki for further details on the functionality of pravega metadata layer:
https://github.com/pravega/presto-connector/wiki/Schema-Registry