[Sample PR|WIP] Spark View Catalog with HMS and Coral

[ljfgem]

Design Doc: Spark View Catalog with Coral & HMS

This PR is mostly based on the upstream Spark view catalog PR with some modifications on that PR:

1. Used CatalogAndIdentifier rather than NonSessionCatalogAndIdentifier during the view substitution, because there might be the use case that spark_catalog (session catalog) is set to be custom table & view catalog. NonSessionCatalogAndIdentifier doesn't support such a use case. Commented on the upstream PR.

The unit tests worked well.

[wmoustafa]

Could you make the design doc public and link it from here?

[ljfgem]

Could you make the design doc public and link it from here?

@wmoustafa Added in the description, but due to the org restriction, I can only share a copied doc (without previous comments) from my personal google account.