Audio File Cleanup (#74863)

## About The Pull Request
Removes a bunch of sound files that we don't use and moves some sound
files into better locations. I'm hoping to get an archive repo for
sounds going, much like the
[map_depot](https://github.com/tgstation/map_depot) and
[SS13-sprites](https://github.com/tgstation/SS13-sprites).

EDIT: The old sound files are being moved here:
https://github.com/tgstation/SS13-sounds

Also increased the volume of the clownana rustle sound and clipped off
some dead air from shockwave_explosion

## Why It's Good For The Game
Removes a total of 1.95MB worth of unused sound files from the codebase.

## Changelog
🆑 Tattle
soundadd: increased the volume of the clownana rustle
/🆑

---------

Co-authored-by: tattle <article.disaster@gmail.com>

code/modules/mapfluff/ruins/spaceruin_code/meateor.dm

@@ -127,5 +127,5 @@
 
 /obj/structure/meateor_fluff/abandoned_headcrab_egg/atom_destruction(damage_flag)
 	new /obj/effect/decal/cleanable/xenoblood(loc)
-	playsound(loc, 'sound/effects/gib_step.ogg', vol = 50, vary = TRUE, pressure_affected = FALSE)
+	playsound(loc, 'sound/effects/footstep/gib_step.ogg', vol = 50, vary = TRUE, pressure_affected = FALSE)
 	return ..()