Add ashtray persistence & fixes (#21925)

# Summary

This PR adds persistency to ash trays. This in turn fixes cigarettes
butts spawning a round later in locations where non-empty ash trays were
found.

## Changes

- Add persistence to ash trays and prevent (fixes) cigarette butt
persistence if in an ash tray.
- Fixed cigarette butts not being persistent if the cigarette was put
out on purpose and landing on the floor.
- Fixed loss of registered persistence track on item pickup.
- Fixed persistent tracks when item is held by player.
- Removed all ash trays on the Horizon as their existence is now
persistent. One-time job for operations after merge.
- Fixed matter configuration on `/obj/item/material` not being set
during `set_material()`.
- Fixed persistent trash on space turfs.
- Minor adjustments in SQL/Readme.md.

---------

Signed-off-by: FabianK3 <21039694+FabianK3@users.noreply.github.com>
Co-authored-by: VMSolidus <evilexecutive@gmail.com>

code/game/objects/items.dm

@@ -629,9 +629,6 @@
 
 	user.update_equipment_speed_mods()
 
-	if(persistency_considered_trash || persistence_track_active) // The moment trash like items get picked up they are no longer persistent
-		SSpersistence.deregister_track(src)
-
 /obj/item/proc/check_equipped(var/mob/user, var/slot, var/assisted_equip = FALSE)
 	return TRUE