Feature request: Add support for MS SQL Synonyms

### Is your proposal related to a problem?

MS SQL provides a feature called [synonym](https://learn.microsoft.com/en-us/sql/relational-databases/synonyms/synonyms-database-engine?view=sql-server-ver16).
> A synonym is a database object that serves the following purposes:
>
> - Provides an alternative name for another database object, referred to as the base object, that can exist on a local or remote server.
>
> - Provides a layer of abstraction that protects a client application from changes made to the name or location of the base object.

Currently table synonyms cannot be tracked in Hasura. It does not even get listed along with untracked tables.

### Describe the solution you'd like

Provide support to track and use MS SQL table synonyms in Hasura.