[MISSED MIRROR] Various spider fixes (#76528) (#22395)

Various spider fixes (#76528)

## About The Pull Request

Fixes #76484
Then I noticed some weird stuff which slipped through the PR and poked
at that too.

- Spiderlings and Spiders once more have names ending in (###)
- Removed an unused property on Spiderlings.
- Rewrote the descriptions for a bunch of web-abilities and web-objects
to be clearer and have better capitalisation.
- Refactored the "Web Carcass" ability to not extend from "lay web" as
it didn't need to perform most of that behaviour.
- Also I renamed it and made the description give you a hint about why
you would want to instantly spawn a statue.
- The web effigy now despawns at the same rate as the ability cools down
so you're not dumping spider statues all over the place.
- I made spiderlings move at about the same speed as humans except if
they're on webs in which case they're still pretty fast.

To be honest I am not certain an instant statue spawning button is great
to begin with and I didn't even know it was added to the game but I am
not interested in messing much with the balance for now.

This made me look at spiderlings enough that I'm going to try and make a
new sprite for them that isn't awful.

## Why It's Good For The Game

Lets you differentiate individual spiders a little bit.
Makes usage of abilities clearer.

## Changelog

🆑
balance: Guard spider web statues despawn as the ability comes back off
cooldown.
balance: Spiderlings now only move at light speed if they're on webs,
stay safe little guys.
fix: Spiders once again have random numbers after their names.
/🆑

Co-authored-by: Jacquerel <hnevard@gmail.com>

code/modules/mob_spawn/ghost_roles/spider_roles.dm

@@ -50,7 +50,6 @@
 /obj/effect/mob_spawn/ghost_role/spider
 	name = "egg cluster"
 	desc = "They seem to pulse slightly with an inner life."
-	mob_name = "\improper spider"
 	icon = 'icons/effects/effects.dmi'
 	icon_state = "eggs"
 	move_resist = MOVE_FORCE_NORMAL
@@ -199,5 +198,4 @@
 	if(QDELETED(src) || QDELETED(user) || !chosen_spider)
 		return FALSE
 	mob_type = chosen_spider
-	mob_name = "spiderling"
 	return ..()