[PORT] Implements icon size caching to avoid unnecessary load in updatehealth

[Absolucy]

About The Pull Request

Port of tgstation/tgstation#88266

Technically an improved port of DaedalusDock/daedalusdock#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

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