Vampire antag fixes and changes

[ta3754859-max]

About The Pull Request

Fixes and small changes to vampire antags, since Kevin no longers works on them.
This includes a button to adding experience directly to a coven, quietus fixes as they were really unfinished and any more fixes/changes I'll update this pr with.

Why It's Good For The Game

Experience add button - Many abilities are either painful to level up or extremly lrp to do so. For example, obsfucation requires you to not move for around 5 minutes waiting for the bloodcost to level it up. The lrp ones require you to spam abilities like forcing a mob to walk towards you, then scaring them so they run (which obviously wouldn't be possible to do on an actual player as it would be extremly immersion breaking). As to balance it out I made the vitae spend in level up be less potent than vitae gained through normal ability usage.

Changelog

🆑
fix: Quietus scorpion's touch now properly gets removed on use
fix: Dagon's call now ignites a person too, instead of just giving them fire stacks
add: Button in clan menu for directly increasing coven exp using vitae
/:cl:

Pre-Merge Checklist

• You tested this on a local server.
• This code did not runtime during testing.
• You documented all of your changes.