[Code maintenance] Variable cleanup

[GDNgit]

This documents a number of variables which should be removed/altered into a system like traits on basetype objects

/datum

• isprocessing - only checked in some rare cases, convert to a trait. TG also has GC destroyed as a trait, I wouldn't port something like that due to the innate pressure it puts on the GC (and potential byond weirdness)
• var_edited- Convert to a trait
• active_timers - Potentially does not need to exist, could use a signal system for example. Only currently used for the doppler_array
• tgui_shared_states - Doesn't actually appear to be needed but may be a pain in the ass to remove, pretty much used just with the autolathe and cargo console

/atom

• suit_fibers - handled pretty well but could be a bit better in some ways, diet lazy list
• level - underutilized variable that basically just matters for pipes being under the floor, we got other ways to do this now
• pass_flags_self - value never changed
• germ_level - could be changed to just be a var on specific datums instead of ALL atoms
• simulated - set on 3 datums, just removing it will probably be fine
• bubble_icon - basically a mob var on atoms for some strange reason
• dont_save - set to true on mobs and nothing else, convert to istype
• container_type - this ain't ever gonna be something turfs or areas gotta worry about, should be on the movable level
• hud_list - movable var on atom
• original_atom - unused
• can_leave_fibers - clothing level var on the atom level - Handled in Moves the can_leave_fibers var to /obj/item/clothing instead of being on /atom #23005
• admin_spawned - Trait based approach works for this
• atom_colours - we have initial(), probably not needed
• chat_color_name - we don't compare this value, unused
• chat_color - questionable if it needs to exist, isn't called very often and is overridden by get_runechat_color in some cases, probably could be mob only at least
• blood_color - mob var on atom, blood is also due for a refactor

/movable

• move_speed - pretty much unused
• l_move_time - used just for organs now, can be refactored out quite easily
• no_spin - called rarely, trait em boys
• no_spin_thrown - does not need to exist
• moved_recently - unused except for the electropack, does not need to exist
• face_while_pulling - probably doesn't need to exist, and if it does better as a trait
• throwforce - random item var on the movable level
• inertia_moving - unset in the same proc it's called in
• create_point_bubble - random item var in movable

/mob

• leap_icon - random alien hunter var on mobs
• use_me - not needed, can just override the verb
• damageoverlaytemp - why does this exist
• attack_log_old - generally retired
• currently_grab_pulled - grab moment
• can_strip
• name_archive - don't think this needs to exist anymore
• flying - trait it
• satiety - carbon var on mobs
• research_scanner - trait it
• mapobjs - unused
• dna - carbon level on mob level
• radiation - carbon level on mob level
• move_on_shuttle - set on one place, istype it
• has_enabled_antagHUD - ghost level var on mob
• can_change_intents - could be a trait
• proc_holder_list - basically unused
• lastarea - uneeded
• has_unlimited_silicon_privilege - trait it
• control_object - does not need to exist
• player_logged - should be a mind var tbh
• player_ghosted - replace with a timer
• listed_turf - this is some jank shit right here
• shouldnt_see - we just never set this LMAO
• last_logout - probably doesn't need to exist
• chameleon_item_actions - could just be done without the related list
• tkgrabbed_objects - could be handled better or at the least bumped up

/turfs

• pathing_pass_method - unused

/area

• report_alerts - not compared anywhere
• no_air - unused
• uid & global_uid - we still just use UIDs
• is_haunted - trait it

/obj

• species_exception - random item var on obj
• sharp - random item var on obj
• force - random item var on obj
• custom_fire_overlay - just add behavior on a child call vs this
• speed_process - trait it
• on_blueprints - trait it
• force_blueprints - never set
• suicidal_hands - istype it
• emagged - trait it