Fix `LFS enabled` select box.
A refactor of the project edit page caused the `lfs_enabled` setting to be reverted to a non functioning state. This MR fixes that.
This will most likely need to be ported back to 8.13 and 8.14. 8.12 contained the correct code.
Fixes #24645
Related commits:
- ea3bbbde
- da07c2e4
cc @stanhu @dblessing @dbalexandre @rymai
See merge request !7716
