fix: diff declarative schemas without stop

[sweatybridge]

What kind of change does this PR introduce?

feature

What is the new behavior?

Try template database for declarative schema.

Additional context

Migrations which don't work

• create extension pg_cron

ERROR: can only create extension in database postgres (SQLSTATE P0001)
Jobs must be scheduled from the database configured in cron.database_name, since the pg_cron background worker reads job descriptions from this database.

Possible solution is to remove pg_cron from declared schemas and diff output.