DEICH-5734 koha oauth2: cleanup permissions check in auth and only sync local deb users
Closes DEICH-5734 mainly this cleans up logic of permissions parsing from oauth2 tokens and makes sure only deb users with role employee are synced to local db
Closes DEICH-5734 mainly this cleans up logic of permissions parsing from oauth2 tokens and makes sure only deb users with role employee are synced to local db