fix(steps): remove custom and custom sql deprecated steps from action menu [TCTC-7178]

[alice-sevin]

We remove the deprecated 'Custom sql' and 'Custom' steps from action menu. It won't be usable anymore with hybrid pipeline

:information_source: We don't remove steps code and pipeline listing because we may have migrated apps with custom steps so we want them to be removed before cleaning the code The customs steps are still accessible (to be deleted) if a step has been created earlier but app builder won't be able to create new ones