Intergration test to verify backwards compatibility

With multistage deployemnts we have both old and a new versions of the praefect service running and sharing the same database. We must be sure the changes done to the database schema doesn't affect the old version of the praefect functionality and it operates without issues.

The new job was added to the pipeline to verify compatibility of the previous release and latest changes done to schema migration. The pipeline runs only if a new migration was added compared to the master branch.

Closes: #3338 (closed)