Resolve "Division restrictions are not working (for limited capacity labs)"

What does this mr do?

When a lab without groups uses restrictions, nobody could enqueue because we only check group level for module division.

Actions taken to fix bug

This has been changed now so that we also check user level. This means that, if the user who is making the request is in the division, the request will be allowed to pass. (Even if the other group members aren't in the division)

Does this MR meet the acceptance criteria?

• I have added a changelog entry to reflect the significant changes I made and the bug I fixed.
• A test was created to test the bug.
• I have updated the documentation accordingly.
• I adhere to the style guide. Closes #530 (closed)