Life changes (#19560)

Refactored Life() to receive seconds per tick and times fired as
parameters.
Life() now cannot be slept in, turned various sleepings into async calls
procs.
Optimized mob AI subsystems, gave them new priorities levels and flags.
Grab upgrades are now elaborated asynchronously, tweaked them to avoid
stacking multiple upgrades.
Fixed plains tyrants keeping sending messages about stomping even if
dead.

code/modules/mob/abstract/freelook/life.dm

@@ -1,4 +1,4 @@
-/mob/abstract/eye/Life()
+/mob/abstract/eye/Life(seconds_per_tick, times_fired)
 	..()
 	// If we lost our client, reset the list of visible chunks so they update properly on return
 	if(owner == src && !client)

code/modules/mob/abstract/observer/observer.dm

@@ -145,7 +145,7 @@ Transfer_mind is there to check if mob is being deleted/not going to have a body
 Works together with spawning an observer, noted above.
 */
 
-/mob/abstract/observer/Life()
+/mob/abstract/observer/Life(seconds_per_tick, times_fired)
 	..()
 	if(!loc) return
 	if(!client) return 0