[NO GBP] Minor Turbine Patches (#76713)

## About The Pull Request
If the turbine compressor input turf or the stator output turf was
destroyed while the turbine is running(say the turf was bombed or
deconstructed with an RCD) then the turbine would runtime as it would
attempt to dump gases on the deleted turf.

This fixes that.

Also adds a warning examine for the rotor if its parts are not
connected, to let you know if something is off which is useful when you
don't have the turbine computer to tell you that.

## Changelog
🆑
fix: turbine does not runtime when its input or output turf is destroyed
while its running
qol: add warning examine for rotor when its parts are not connected
/🆑

code/modules/power/turbine/turbine.dm

@@ -242,15 +242,11 @@
 	///Ratio of the amount of gas going in the turbine
 	var/intake_regulator = 0.5
 
-/obj/machinery/power/turbine/inlet_compressor/activate_parts(mob/user, check_only)
-	. = ..()
-	input_turf = get_step(loc, turn(dir, 180))
-
 /obj/machinery/power/turbine/inlet_compressor/deactivate_parts(mob/user)
 	. = ..()
-	if(!isnull(rotor))
+	if(!QDELETED(rotor))
 		rotor.deactivate_parts()
-		rotor = null
+	rotor = null
 	input_turf = null
 
 /**
@@ -260,6 +256,9 @@
 /obj/machinery/power/turbine/inlet_compressor/proc/compress_gases()
 	compressor_work = 0
 	compressor_pressure = MINIMUM_TURBINE_PRESSURE
+	if(QDELETED(input_turf))
+		input_turf = get_step(loc, turn(dir, 180))
+
 	var/datum/gas_mixture/input_turf_mixture = input_turf.return_air()
 	if(!input_turf_mixture)
 		return 0
@@ -299,19 +298,17 @@
 	/// The turf to puch the gases out into
 	var/turf/open/output_turf
 
-/obj/machinery/power/turbine/turbine_outlet/activate_parts(mob/user, check_only)
-	. = ..()
-	output_turf = get_step(loc, dir)
-
 /obj/machinery/power/turbine/turbine_outlet/deactivate_parts(mob/user)
 	. = ..()
-	if(!isnull(rotor))
+	if(!QDELETED(rotor))
 		rotor.deactivate_parts()
-		rotor = null
+	rotor = null
 	output_turf = null
 
 /// push gases from its gas mix to output turf
 /obj/machinery/power/turbine/turbine_outlet/proc/expel_gases()
+	if(QDELETED(output_turf))
+		output_turf = get_step(loc, dir)
 	//turf is blocked don't eject gases
 	if(!TURF_SHARES(output_turf))
 		return FALSE
@@ -403,6 +400,8 @@
 	. = ..()
 	if(!panel_open)
 		. += span_notice("[EXAMINE_HINT("screw")] open its panel to change cable layer.")
+	if(!all_parts_connected)
+		. += span_warning("The parts need to be linked via a [EXAMINE_HINT("multitool")]")
 
 /obj/machinery/power/turbine/core_rotor/cable_layer_change_checks(mob/living/user, obj/item/tool)
 	if(!panel_open)