fix(blood): Modifies remove_reagent calls to remove_blood calls

Fixes https://github.com/VOREStation/VOREStation/issues/14817

remove_reagent has no sanitization for making sure the person has at least 1 u of blood remaining, and is therefore unsafe to use.

This commit changes all human remove_reagent("blood", amt) calls with remove_blood(amt).

This should prevent blood disappearing from internal bleeding or dragging someone while they're down or from drawing blood from them and so forth.

Not all cases of remove_reagent("blood", amt) were changed, as some act on organs or other reagent containers not part of a human mob or because it's set_species

code/modules/organs/blood.dm

@@ -260,7 +260,7 @@ var/const/CE_STABLE_THRESHOLD = 0.5
 		return null
 
 	. = ..()
-	vessel.remove_reagent("blood",amount) // Removes blood if human
+	remove_blood(amount) // Removes blood if human
 
 //Transfers blood from container ot vessels
 /mob/living/carbon/proc/inject_blood(var/datum/reagent/blood/injected, var/amount)

code/modules/organs/organ_external.dm

@@ -750,7 +750,7 @@ Note that amputating the affected organ does in fact remove the infection from t
 			if(!(W.can_autoheal() || (bicardose && inaprovaline) || myeldose))	//bicaridine and inaprovaline stop internal wounds from growing bigger with time, unless it is so small that it is already healing
 				W.open_wound(0.1 * wound_update_accuracy)
 
-			owner.vessel.remove_reagent("blood", wound_update_accuracy * W.damage/40) //line should possibly be moved to handle_blood, so all the bleeding stuff is in one place.
+			owner.remove_blood( wound_update_accuracy * W.damage/40) //line should possibly be moved to handle_blood, so all the bleeding stuff is in one place.
 			if(prob(1 * wound_update_accuracy))
 				owner.custom_pain("You feel a stabbing pain in your [name]!", 50)