Adds sanity checking to the tippable component (#78771)

## About The Pull Request

The tippable component doesn't actually have any sanity checking for if
the tippable thing has already been tipped. This means that if two
people try to tip something over at the same time, it will appear
untipped but be immobilized as though it were tipped. The sprite will
also stay permanently flipped until the bug is preformed again. Now that
doesn't happen. Closes #64232.
## Why It's Good For The Game

As funny as it is to see upside-down borgs running around, its still a
bug.
## Changelog
🆑
fix: Borgs will no longer become permanently upside-down if tipped over
by multiple people at the same time.
/🆑

code/datums/components/tippable.dm

@@ -133,6 +133,8 @@
 /datum/component/tippable/proc/do_tip(mob/living/tipped_mob, mob/tipper)
 	if(QDELETED(tipped_mob))
 		CRASH("Tippable component: do_tip() called with QDELETED tipped_mob!")
+	if (is_tipped) // sanity check in case multiple people try to tip at the same time
+		return
 
 	to_chat(tipper, span_warning("You tip over [tipped_mob]."))
 	if (!isnull(tipped_mob.client))
@@ -185,6 +187,8 @@
 /datum/component/tippable/proc/do_untip(mob/living/tipped_mob, mob/untipper)
 	if(QDELETED(tipped_mob))
 		return
+	if (!is_tipped) // sanity check in case multiple people try to untip at the same time
+		return
 
 	to_chat(untipper, span_notice("You right [tipped_mob]."))
 	tipped_mob.visible_message(