A previous PR moved the CourseEditLTIFieldsEnabledFlag model to the LTI consumer
XBlock's repo. The migrations in the XBlock repo check if the model already
exists, and if so, it will avoid creating the model. However, it seems that
in some cases the LTI consumer XBlock's migrations run first, creating the model
and causing the edx-platform migrations to fail due to a pre-existing table
since no such check is performed in the migrations in edx-platform.
Since the only migrations that exist for this model are one that creates it and
another that deletes it, this change creates a squashed miration that just skips
creating the model since for new installs the LTI Consumer XBlock should handle
it.
* fix type mismatch in third_party_auth migrations
* fix type mismatch in verify_student migrations
* fix type mismatch in video_config migrations
* fix type mismatch in verified_track_content migrations
* fix type mismatch in commercemigrations
* fix type mismatch in xblock_config migrations
* fix type mismatch in course_creators migrations
* fix type mismatch in contentstore migrations
