--replication-tables and --replication-tables-ignore are not respected when connecting to a MySQL upstream

[ethan-readyset]

Description

We have two flags to control which tables are snapshotted and replicated by Readyset:

• --replication-tables, which takes a list of the tables that should be snapshotted/replicated; and
• --replication-tables-ignore, which takes a list of the tables that should not be snapshotted/replicated

Currently, these flags only work when we are connected to a Postgres upstream. We should fix this so the flags are respected when connected to MySQL as well.

Change in user-visible behavior

Yes

Requires documentation change

No