Corrects 200+ instances of "it's" where it should've been "its" instead (#85169)

## About The Pull Request

it's - conjunction of "it" and "is"
its - possessive form of "it"

grammar is hard, and there were a lot of places where "it's" was used
where it shouldn't have been. i went and painstakingly searched the
entire repository for these instances, spending a few hours on it. i
completely ignored the changelog archive, and i may have missed some
outliers. most player-facing ones should be corrected, though
## Why It's Good For The Game
proper grammar is good

## Changelog
🆑
spellcheck: Numerous instances of "it's" have been properly replaced
with "its"
/🆑

code/modules/meteors/meteor_dark_matteor.dm

@@ -32,7 +32,7 @@
 	START_PROCESSING(SSobj, src)
 
 /obj/effect/meteor/dark_matteor/process(seconds_per_tick)
-	//meteor's warp quickly contracts then slowly expands it's ring
+	//meteor's warp quickly contracts then slowly expands its ring
 	animate(warp, time = seconds_per_tick*3, transform = matrix().Scale(0.5,0.5))
 	animate(time = seconds_per_tick*7, transform = matrix())