fixes verbs not actually queuing. (#68990)

thanks to Vallat for pointing this out

whoops turns out most verbs havent been queued since may 11th because I made /datum/controller/subsystem/verb_manager have the SS_NO_INIT flag, without also removing a check in verb_manager/proc/can_queue_verb() that stops the verb callback from being queued if the subsystem isnt initialized yet. since subsystems with SS_NO_INIT obviously never have initialized set to TRUE, this always failed for every verb manager subsystem except for SSinput (because it doesnt have SS_NO_INIT).

also adds a debug var to force a subsystem to always queue incoming verbs if possible.

now the default verb management subsystem, and speech_controller will successfully queue verbs again. SSinput always queued verbs so that shouldnt change.

code/modules/unit_tests/resist.dm

@@ -12,6 +12,10 @@
 	// Stop, drop, and roll has a sleep call. This would delay the test, and is not necessary.
 	call_async(human, /mob/living/verb/resist)
 
+	//since resist() is a verb that possibly queues its actual execution for the next tick, we need to make the subsystem that handles the delayed execution process
+	//the callback. either that or sleep ourselves and see if it ran.
+	SSverb_manager.run_verb_queue()
+
 	TEST_ASSERT(human.fire_stacks < 5, "Human did not lower fire stacks after resisting")
 
 /// Test that you can resist out of a container
@@ -26,4 +30,9 @@
 	TEST_ASSERT(human in closet.contents, "Human was not in the contents of the closed closet")
 
 	human.resist()
+
+	//since resist() is a verb that possibly queues itself for the next tick, we need to make the subsystem that handles the delayed execution process
+	//the callback. either that or sleep ourselves and see if it ran.
+	SSverb_manager.run_verb_queue()
+
 	TEST_ASSERT(!(human in closet.contents), "Human resisted out of a standard closet, but was still in it")