Implements icon size caching to avoid unnecessary load in updatehealth (#88266)

## About The Pull Request

Technically an improved port of
https://github.com/DaedalusDock/daedalusdock/pull/651, instead of only
storing height over 32 pixels for HUDs we store both pure height and
width for the sake of cutting down on icon operation spam (which is
pretty costly). Should save us a significant amount of time, cuts down
update_health_hud times by 45% and total update_health by 30% which is
pretty good for a somewhat hot proc.

## Why It's Good For The Game

Our health HUDs constantly fetch icons ***twice*** every update_health,
jesus.

## Changelog
🆑 SmArtKar, Kapu
code: Implemented caching for icon sizes which should significantly
improve mob health performance due to HUDs constantly fetching icons
/🆑

code/game/objects/effects/temporary_visuals/miscellaneous.dm

@@ -443,8 +443,7 @@
 	var/size_matrix = matrix()
 	if(size_calc_target)
 		layer = size_calc_target.layer + 0.01
-		var/icon/I = icon(size_calc_target.icon, size_calc_target.icon_state, size_calc_target.dir)
-		size_matrix = matrix() * (I.Height()/ICON_SIZE_Y)
+		size_matrix = matrix() * (size_calc_target.get_cached_height()/ICON_SIZE_Y)
 		transform = size_matrix //scale the bleed overlay's size based on the target's icon size
 	var/matrix/M = transform
 	if(shrink)