* Small hulk cleanup / nukes `TRAIT_IGNOREDAMAGESLOWDOWN` (#85003)
## About The Pull Request
I was investigating a bug with hulk in which using it while damaged
doesn't put you back on full speed
I noticed `TRAIT_IGNOREDAMAGESLOWDOWN` on its own was subtly broken, in
that it did nothing if the user did not call `updatehealth` afterwards
And guess what, most (if not all) uses of the trait did not do this, so
it never applied correctly
So I nuked the trait entirely, made all uses of it use the same thing
morphine uses (`/datum/movespeed_modifier/damage_slowdown`)
And since I was auditing this I saw the ball module was broke, it
removed the immunity but never added it. Quick fix
I also cleaned up some Hulk stuff while I was in the area because I was
in the area. I removed all instances of `check_mutation` and replaced it
with trait checking because it made more sense.
I also also fixed a bug with the simple flying element never removing on
detach because I touched something that uses it for the above change.
## Changelog
🆑 Melbert
fix: Using hulk (and a myriad of similar effects) now properly updates
your movespeed to ignore the damage movespeed penalty
fix: Some things which temporarily make you fly don't make you fly
forever
fix: MODsuit ball module now properly makes you immune to damage
movespeed penalty when in ball form
fix: Adding Hulk via VV dropdown doesn't default to adding the strongest
hulk available (that which is used by the medieval pirates)
/🆑
* Small hulk cleanup / nukes `TRAIT_IGNOREDAMAGESLOWDOWN`
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Co-authored-by: MrMelbert <51863163+MrMelbert@users.noreply.github.com>
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