Use can_atmos_pass to reduce proc-calls in c_airblock()

- Add additional can_atmos_pass value ATMOS_PASS_PROC which indicates custom behavior requiring calling the CanZASPass proc.
  - The benefit being for the other three values we DON'T need to call CanZASPass at all!  We already know the behavior without the overhead of a proc call.
  - Obviously any atom with can_atmos_pass = ATMOS_PASS_PROC cannot now call ..() in CanZASPass() since the default behavior would be to (recursively) call CanZASPass()
  - This required re-numbering the constants, so I also fixed all code that assumed particular values for the constants.
- Switched all types which overrode CanZASPass with custom logic to be can_atmos_pass = ATMOS_PASS_PROC
- Changed /turf/c_airblock() to skip calling /atom/movable/c_airblock() for the three can_atmos_pass values that don't require calling the proc.

code/modules/mob/living/living_movement.dm

@@ -8,10 +8,6 @@
 		return !P.can_hit_target(src, P.permutated, src == P.original, TRUE)
 	return (!mover.density || !density || lying)
 
-// There is no need to override this if you're just going to unconditionally return TRUE.  Set can_atmos_pass instead.
-///mob/CanZASPass(turf/T, is_zone)
-//	return TRUE
-
 /mob/living/SelfMove(turf/n, direct)
 	// If on walk intent, don't willingly step into hazardous tiles.
 	// Unless the walker is confused.

code/modules/power/turbine.dm

@@ -28,6 +28,7 @@
 	icon_state = "compressor"
 	anchored = TRUE
 	density = TRUE
+	can_atmos_pass = ATMOS_PASS_PROC
 	circuit = /obj/item/weapon/circuitboard/machine/power_compressor
 	var/obj/machinery/power/turbine/turbine
 	var/datum/gas_mixture/gas_contained