Pixel adjustments to mobs are now sourced / Refactors riding (#89320)

Fixes #85980

- Pixel adjustments are now sourced

When tweaking a mob's pixel w, x, y, z, is is now done via `add_offsets`
and must have a source string associated

- Refactors riding

Refactors how riding component selects the offsets to use. It's now all
done via the getter rather than a weird mix of a var, a cache, and a
getter.

- Moves a bunch of animations to use `pixel_w` / `pixel_z`

Largely to prevent conflicts with adjustments to a mob's pixel position,
but also as many animations are not actual movements, but visual
movements. Floating is one such example.

It just works

🆑 Melbert
fix: Fixed grab offsets not showing for anything but passive grab
fix: Fix jank with mob offsets when riding things
refactor: Refactored riding component, particularly how it selects layer
and offsets. Report any oddities
refactor: Refactored pixel offsets of mobs. Report any oddities
/🆑

code/modules/mob/living/basic/icemoon/wolf/wolf_extras.dm

@@ -9,10 +9,10 @@
 // Contains pixel offset data for sprites riding wolves
 /datum/component/riding/creature/wolf
 
-/datum/component/riding/creature/wolf/handle_specials()
-	. = ..()
-	set_riding_offsets(RIDING_OFFSET_ALL, list(TEXT_NORTH = list(1, 9), TEXT_SOUTH = list(1, 9), TEXT_EAST = list(0, 9), TEXT_WEST = list(2, 9)))
-	set_vehicle_dir_layer(SOUTH, ABOVE_MOB_LAYER)
-	set_vehicle_dir_layer(NORTH, OBJ_LAYER)
-	set_vehicle_dir_layer(EAST, OBJ_LAYER)
-	set_vehicle_dir_layer(WEST, OBJ_LAYER)
+/datum/component/riding/creature/wolf/get_rider_offsets_and_layers(pass_index, mob/offsetter)
+	return list(
+		TEXT_NORTH = list(1, 9, OBJ_LAYER),
+		TEXT_SOUTH = list(1, 9, ABOVE_MOB_LAYER),
+		TEXT_EAST =  list(0, 9, OBJ_LAYER),
+		TEXT_WEST =  list(2, 9, OBJ_LAYER),
+	)