Update scripts based on recent configlet changes

[devkabiir]

I noticed in the recent PR #295, that our check_formatting is running configlet lint manually, which is no longer required since #283 added a separate workflow for it.

The following scripts need to be updated:

• check_formatting

• create_exercise

  • Will likely be replaced by a new generator used for all tracks with an plugin/extension for the dart track.

• presubmit also needs an update.

configlet fmt is not supported at the moment. Maybe later

Originally posted by @ErikSchierboom in #301 (comment)