Fixes #23932 - Fixes failing application job tests for some plugins

The tests were failing with:
Sequel::DatabaseError: PG::DuplicateTable:
ERROR: relation "dynflow_execution_plans" already exists

This failure was probably caused by forcing initialization of the...

• Fixes #23611 - Provide helper method to run "service" active jobs

The root cause was we were triggering the active jobs too early,
sometimes even before the db was migrated. This led to all sorts of
errors. The provided helper method does not trigger the jobs when in...