Dehardcoded modsuit fixes (#83425)

## About The Pull Request
Patches up some things that were lacking post #82905
- Some missing (un)seal messages
- a missed direct use of the mod_parts list
EDIT: Also fixes the modsuit painter, and makes sure modsuits can still
be set to use custom dmi files via
`MOD_ICON_OVERRIDE`/`MOD_WORN_ICON_OVERRIDE`
Fixes #83442
## Changelog
🆑
fix: some missing modsuit (un)sealing messages should no longer be
missing
fix: MOD circuit adapter core deployed parts output should work again
fix: Modsuit painter works again
/🆑

code/modules/wiremod/shell/module.dm

@@ -271,7 +271,7 @@
 	SIGNAL_HANDLER
 	var/string_list = list()
 	var/is_deployed = TRUE
-	for(var/obj/item/part as anything in attached_module.mod.mod_parts)
+	for(var/obj/item/part as anything in attached_module.mod.get_parts())
 		if(part.loc == attached_module.mod)
 			is_deployed = FALSE
 		else