Summary:
This revision removes the beta warning for the following commands associated with Foreign Data Wrappers:
- Foreign Data Wrapper
- `CREATE FOREIGN DATA WRAPPER`
- `ALTER FOREIGN DATA WRAPPER`
- Foreign Server
- `CREATE SERVER`
- `ALTER SERVER`
- Foreign Table
- `CREATE FOREIGN TABLE`
- User Mapping
- `CREATE USER MAPPING`
- `ALTER USER MAPPING`
- `DROP USER MAPPING`
**Notes**
- `DROP FOREIGN DATA WRAPPER`, `DROP SERVER`, `DROP FOREIGN TABLE` are all already whitelisted commands under DropStmt.
- `ALTER FOREIGN TABLE` is also already whitelisted under AlterTableStmt, AlterObjectSchemaStmt, RenameStmt.
This revision whitelists the SQL commands related to FDW, not the data wrappers themselves.
Currently, postgres_fdw and file_fdw are data wrappers that are supported by YugabyteDB.
Output:
```
yugabyte=# CREATE FOREIGN DATA WRAPPER postgres_fdw2
HANDLER postgres_fdw_handler
VALIDATOR postgres_fdw_validator;
CREATE FOREIGN DATA WRAPPER
yugabyte=# ALTER FOREIGN DATA WRAPPER postgres_fdw2 RENAME TO postgres_fdw3;
ALTER FOREIGN DATA WRAPPER
yugabyte=# DROP FOREIGN DATA WRAPPER postgres_fdw3;
DROP FOREIGN DATA WRAPPER
```
Jira: DB-1452
Test Plan: Run Jenkins
Reviewers: fizaa, smishra
Reviewed By: fizaa
Subscribers: yql
Tags: #jenkins-ready
Differential Revision: https://phorge.dev.yugabyte.com/D45062