- Addresses https://gitlab.com/gitlab-org/gitlab/-/issues/355907#note_894838163
- Exposes gl-mt-5 and gl-mb-5 in notify_enhanced.scss. These classes
  should have no effect when the :enhanced_notify_css feature flag
  is off.

Approach:

- p tags outside `.md` already have padding
- div tags outside `.md` do not
- Remove our globally applied padding from `.md`
- Use `gl-mb-5` on conditionally applied `div` before `.md`
- Use `gl-mt-5` on the `.md` if it definitely comes after a `div`