Selective mineral machine init_process

Requested by SandPoot. Disables init_process for mineral (mining) machines, and enables it on a case-by-case basis.

Downstream mineral machines must be updated with this change.

code/modules/mining/machine_processing.dm

@@ -4,7 +4,7 @@
 
 /obj/machinery/mineral
 	speed_process = TRUE
-	init_process = TRUE // Must be true after init_process fix
+	init_process = FALSE
 	/// The current direction of `input_turf`, in relation to the machine.
 	var/input_dir = NORTH
 	/// The current direction, in relation to the machine, that items will be output to.
@@ -126,6 +126,7 @@
 	var/datum/material/selected_material = null
 	var/selected_alloy = null
 	var/datum/techweb/stored_research
+	init_process = TRUE
 
 /obj/machinery/mineral/processing_unit/Initialize(mapload)
 	. = ..()