To load Tour module's scripts on demand

This extension is being deprecated, see 🌱 [Meta] Tasks to deprecate Tour module Fixed . It will be removed from core and moved to a contrib project, 📌 [11.x] [Meta] Tasks to remove Tour Postponed .

This is now Postponed. The status is set according to two policies. The Remove a core extension and move it to a contributed project → and the Extensions approved for removal → policies.

With tour moving to contrib this feel like no longer needed so will close out. If still a valid task please reopen.