Fixes syndicate mobs not always dropping the correct corpse

[Taurtura]

What Does This PR Do

Fixes #25947 Cleans up how syndicate simplemobs handle dropping their corpses

Why It's Good For The Game

Killing a dangerous mob should give the correct rewards, not sometime give a completely different and random corpse.

Testing

Killed a bunch of space syndicate mobs Killed a bunch of syndicate quartermasters Killed a bunch of regular syndicate mobs

Changelog

:cl: fix: Fixed syndicate mobs not always dropping the correct corpse /:cl: