Revert using bulk_create for new projectlocales

[eemeli]

Fixes #3262

[mathjazz]

Looks good, I'd just add a comment.

Nice work! And sorry for the extra work. 🦆

[mathjazz]

Were these identified via PermissionChangelog?

[eemeli]

No; it doesn't track group permission creations. These are from the following SQL query, which isn't pretty but works:

select a.id as group_id, a.name
from auth_group as a
left join guardian_groupobjectpermission as g on a.id=g.group_id
where g.id is null
  and a.name not like 'terminology%'
  and a.name not like 'tutorial%';