Fixes cases where doors do not bolt correctly (#75882)

## About The Pull Request
Some things, like door control buttons, set locked directly instead of
calling lock() or unlock(). This fixes that, which should make sound
effects play. Also annotates some code where we *don't* want that to
happen with an explanation of why we just set locked directly.

## Why It's Good For The Game
Fixes Skyrat-SS13/Skyrat-tg/issues/21510, which also applies to
upstream.

code/modules/mapping/mapping_helpers.dm

@@ -153,6 +153,7 @@
 				return
 			if(9 to 11)
 				airlock.lights = FALSE
+				// These do not use airlock.bolt() because we want to pretend it was always locked. That means no sound effects.
 				airlock.locked = TRUE
 			if(12 to 15)
 				airlock.locked = TRUE
@@ -201,6 +202,7 @@
 	if(airlock.locked)
 		log_mapping("[src] at [AREACOORD(src)] tried to bolt [airlock] but it's already locked!")
 	else
+		// Used instead of bolt so that we can pretend it was always locked, i.e. no sound effects on init.
 		airlock.locked = TRUE
 
 /obj/effect/mapping_helpers/airlock/unres