Add support for Logical Tables

It can come in handy to have the ability to fully replace a table without any disruption or changes for those issuing queries. If there was support to add/remove (especially atomically add and remove) aliases from tables, it would be easy to reconstruct a table with a new set of configurations, or bootstrapped in a different way than the original table, and then "swap" the table alias to the new table.

Ex. making an incompatible schema or table spec change

Design Doc: https://docs.google.com/document/d/1WX5-3XJ4Nrsod0_rO_JEtvgN9XVKDi_pUySistXAOkY/edit?usp=sharing