Only use RequestStore in ProjectTeam#max_member_access_for_users if it is active

What does this MR do?

This MR modifies ProjectTeam#Max_member_access_for_users so that it does not use RequestStore unless it is active.

Why was this MR needed?

This is done just to be sure there aren't any memory leaks in case a user does disable RequestStore.

Does this MR meet the acceptance criteria?

• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the style guides
• Branch has no merge conflicts with master (if you do - rebase it please)
• Squashed related commits together