Fixes indefinite stasis bug (cmss13-devs#5996)

# About the pull request

Fixes cmss13-devs#5960, The knockdown status effect was applying a floored trait to
the user on every tick through the handle_stasis_bag proc, and the
interrupt_all flags was being passed into the do_after which meant that
it wouldn't be possible to execute the action. This is because every
time the user clicked the resist verb the interrupt_knocked_down (part
of interrupt_all) flag in conjunction with the floored trait would
always return false.

To solve this I instead passed in the interrupt_unconscious flag,
meaning the other conditions would allow the user to resist out of the
bag, we could instead just apply a Root (immobilize status effect) to
the handle_stasis_bag proc and pass in the interrupt_all flag into the
do_after as it was before. The only difference being when the user exits
the bag they will be standing up instead of lying down, and all other
interrupts will cause the action to cancel. (KnockDown applies both a
floored and immobilize trait, Root just applies the immobilize trait).
Or we can just modify the bitflags and pass in a custom one without the
knocked down flag.

# Changelog

:cl:
fix: fixes users not being able to resist out of the stasis bags
/:cl:

code/modules/mob/living/living_verbs.dm

@@ -66,7 +66,7 @@
 		if (BB.opened)
 			return
 		visible_message("[BB] begins to wiggle violently!")
-		if(do_after(src, 5 SECONDS, INTERRUPT_ALL, BUSY_ICON_HOSTILE, BB))//5 second unzip from inside
+		if(do_after(src, 5 SECONDS, INTERRUPT_UNCONSCIOUS, BUSY_ICON_HOSTILE, BB))//5 second unzip from inside
 			BB.open()
 
 		///The medical machines below are listed separately to allow easier changes to each process