Fixes many wall errors

[AMyriadseviltwin]

Document the changes in your pull request

Closes #22279

Broke it in #22257 when I forgot to account for things varedited to look like one of the many abductor wall icons I incidentally removed from turf/walls.dmi because (I thought) they were unused.

Also did this:

Each and every single wall in the ships actual abductors spawn in were also varedited like above (💀 )

• ^ Has been fixed with regular abductor walls

I found out the indestructible walls at toxin launch sites were also varedited /turf/closed/indestructible instead of turf/closed/indestructible/riveted

• ^ Created a new subtype turf/closed/indestructible/riveted/testingsite to replace and fix that Also gave it a new description because the old one was weird (ahj yes fixium)

• Fixed regular /turf/closed/indestructible looking like ERROR as well by repathing icons to correct folder and state

• Replaced /turf/closed/indestructible/alien with /turf/closed/indestructible/abductor (it used an outdated icon)

Testing

Yes

Changelog

:cl: AMyriad bugfix: Fixed a floor in bluespace lockers looking like ERROR bugfix: Fixed abductor ship walls looking entirely like ERROR (whoops) bugfix: Fixed the invincible wall found in toxins launch sites looking like ERROR spellcheck: Rewrote flavor text for the indestructible walls at toxins launch sites experimental: Abductor ships probably look incredibly lame and circular now, fixes coming soon /:cl: