Breaking Change: move SQL approvals to SqlApprovals

We have moved SQL-specific APIs from Approvals to a separate class, SqlApprovals.

This will break the following calls:

- Approvals.verify(ResultSet)
+ SqlApprovals.verify(ResultSet)
- Approvals.verify(SqlLoader)
+ SqlApprovals.verify(SqlLoader)

No behavior change; only the entry point moved.

We did this for compatibility with Java Modules (JPMS).