Refactors how machines are deconstructed (#81291)

## About The Pull Request
This refactors how machines are deconstructed in the following ways

- You can no longer override `obj/machinery/deconstruct()`. If you want
customized behaviour then override `on_deconstruction()` instead.

This comes with the added benifit of no longer needing to check for the
`NO_DECONSTRUCTION` flag because the machine base proc does that for us
& if it finds that flag it won't proceed to call `on_deconstruction()`
meaning no machine will have a chance to spawn anything which is the
current behaviour.

This is required to make #81290 work for all machines at least so that
machine can send the `COMSIG_OBJ_DECONSTRUCT` signal without subtypes
overriding & forgetting to call the parent proc

- `dump_contents()` only gets called when the machine is deconstructed
not destroyed thus not leaving behind any of its contents inside. Fixes
https://github.com/tgstation/tgstation/pull/81290#issuecomment-1925752583

## Changelog
🆑
fix: machines that should not drop contents when deleted no longer do.
refactor: refactors how machines are deconstructed. report bugs on
github.
/🆑

---------

Co-authored-by: MrMelbert <51863163+MrMelbert@users.noreply.github.com>

code/modules/paperwork/ticketmachine.dm

@@ -39,10 +39,8 @@
 	tickets.Cut()
 	return ..()
 
-/obj/machinery/ticket_machine/deconstruct(disassembled = TRUE)
-	if(!(obj_flags & NO_DECONSTRUCTION))
-		new /obj/item/wallframe/ticket_machine(loc)
-	qdel(src)
+/obj/machinery/ticket_machine/on_deconstruction(disassembled = TRUE)
+	new /obj/item/wallframe/ticket_machine(loc)
 
 MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/ticket_machine, 32)