Refactors objectives, expands team functionality, and custom teams (#22374)

* step 1

* renaming 1

* how could I forget this

* renaming 2

* renaming 3

* add matching proc, even if unused can remove later

* rename team obj to match

* oops

* okay more stuff

* okay more stuff

* fix this stuff

* okay more stuff

* needs_target = FALSE

* OKAY MORE STUFF

* OOPS AGAIN.

* self-review

* more round_end stuff

* stuff 119

* yeah fix that too

* EVEN MORE CHANGES

* grammar

* fix

* s34n review

* fixes custom teams with no antags not showing objs

* makes objectives work properly with teams

* a

code/modules/mob/living/silicon/ai/latejoin.dm

@@ -21,8 +21,7 @@ GLOBAL_LIST_EMPTY(empty_playable_ai_cores)
 
 	SSjobs.FreeRole(job)
 
-	if(mind.objectives.len)
-		mind.objectives.Cut()
+	if(mind.objective_holder.clear())
 		mind.special_role = null
 	else
 		if(SSticker.mode.name == "AutoTraitor")