Add columns to store project creation settings
Add project creation level column in groups
and default project creation column in application settings
Remove obsolete line from schema
Update migration with project_creation_level column existence check
Rename migrations to avoid conflicts
Update migration methods
Update migration method
The Bitbucket Server as well as other importers pass in a group name to be
created (assuming the user has permission) and attempt to dedupe that with an
existing group. However, the group *name* is not guaranteed to be
unique, but the *path* is.
Closes#50110
