Clean up the loadouts

[Radezolid]

About the PR

New loadouts:

• Warden DeltaV loadout to untouch the upstream one as it's just filled with DeltaV comments.
• Head of Security loadout, same reason as above.
• Detective loadout, same reason.

Changes:

• Cleaned two repeated loadouts groups.
• Moved DeltaV loadout groups to the DeltaV file.
• Modified comments.

The role_loadouts.yml comments are a mess, and moving lines would only cause more conflicts on upstream merge, so i just let them be.

Why / Balance

DeltaV loadouts in upstream files is bad and comments were ugly.

Technical details

Changed role_loadouts.yml to reflect the three new sec DeltaV loadouts.

Media

N/A

Requirements

• I have tested all added content and changes.
• I have added media to this PR or it does not require an ingame showcase.

Breaking changes

None.

Changelog

N/A