[Data checks] Run data checks before migrations

Add a feature to data checks to mark as critical before migrations and make the migration system to run these data checks before migrations are attempted.

added board::todo part::backend type::feature labels

assigned to @hansegucker

created branch 955-data-checks-run-data-checks-before-migrations to address this issue

mentioned in merge request !1369 (merged)

added board::ready label and removed board::todo label

closed with merge request !1369 (merged)

mentioned in commit bce31375

added board::done label and removed board::ready label