Faster snow removal for bigger xenomorphs (#6002)

# About the pull request

makes the snow removal dependant of xenomorph size, making it 1,5 (
lesser) to 4 times (big xenos) faster ( still takes a while even for the
largest xenos to remove deap snow)

# Explain why it's good for the game

removing snow is painful job that makes maps with snow unwanted, huge
xenomorphs should not have that hard time showeling some snow out of
their way, makes it fair with the flames removing snow PR

# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>


# Changelog
:cl:
balance: greatly decreses snow removal time, now it depends on xenomorph
size
/:cl:

---------

Co-authored-by: vincibrv <[email protected]>

code/game/turfs/auto_turf.dm

@@ -198,7 +198,8 @@
 
 	while(bleed_layer > 0)
 		xeno_attack_delay(M)
-		if(!do_after(M, 12, INTERRUPT_ALL, BUSY_ICON_FRIENDLY))
+		var/size = max(M.mob_size, 1)
+		if(!do_after(M, 12/size, INTERRUPT_ALL, BUSY_ICON_FRIENDLY))
 			return XENO_NO_DELAY_ACTION
 
 		if(!bleed_layer)

code/modules/mob/living/carbon/xenomorph/attack_alien.dm

@@ -878,7 +878,8 @@
 
 	while(bleed_layer > 0)
 		xeno_attack_delay(M)
-		if(!do_after(M, 12, INTERRUPT_ALL, BUSY_ICON_FRIENDLY))
+		var/size = max(M.mob_size, 1)
+		if(!do_after(M, 12/size, INTERRUPT_ALL, BUSY_ICON_FRIENDLY))
 			return XENO_NO_DELAY_ACTION
 
 		if(!bleed_layer)