Fixes layering issues brought by the FoV PR. (#63903)

* Fixed most (not all) incorrect planes and layers detected by the unit test.

code/modules/cargo/centcom_podlauncher.dm

@@ -879,6 +879,8 @@ GLOBAL_DATUM_INIT(podlauncher, /datum/centcom_podlauncher, new)
 	image_icon = 'icons/obj/supplypods_32x32.dmi'
 	image_state = "selector"
 	image_layer = FLY_LAYER
+	layer = FLY_LAYER
+	plane = ABOVE_GAME_PLANE
 	alpha = 150
 
 /obj/effect/hallucination/simple/dropoff_location
@@ -886,4 +888,6 @@ GLOBAL_DATUM_INIT(podlauncher, /datum/centcom_podlauncher, new)
 	image_icon = 'icons/obj/supplypods_32x32.dmi'
 	image_state = "dropoff_indicator"
 	image_layer = FLY_LAYER
+	layer = FLY_LAYER
+	plane = ABOVE_GAME_PLANE
 	alpha = 0

code/modules/cargo/supplypod.dm

@@ -459,6 +459,7 @@
 	glow_effect.icon_state = "pod_glow_" + GLOB.podstyles[style][POD_GLOW]
 	vis_contents += glow_effect
 	glow_effect.layer = GASFIRE_LAYER
+	glow_effect.plane = ABOVE_GAME_PLANE
 	RegisterSignal(glow_effect, COMSIG_PARENT_QDELETING, .proc/remove_glow)
 
 /obj/structure/closet/supplypod/proc/endGlow()
@@ -497,6 +498,7 @@
 	icon_state = "pod_engineglow"
 	desc = ""
 	layer = GASFIRE_LAYER
+	plane = ABOVE_GAME_PLANE
 	mouse_opacity = MOUSE_OPACITY_TRANSPARENT
 	alpha = 255
 
@@ -622,6 +624,7 @@
 	setupSmoke(rotation)
 	pod.transform = matrix().Turn(rotation)
 	pod.layer = FLY_LAYER
+	pod.plane = ABOVE_GAME_PLANE
 	if (pod.style != STYLE_INVISIBLE)
 		animate(pod, pixel_z = -1 * abs(sin(rotation))*4, pixel_x = SUPPLYPOD_X_OFFSET + (sin(rotation) * 20), time = pod.delays[POD_FALLING], easing = LINEAR_EASING) //Make the pod fall! At an angle!
 	addtimer(CALLBACK(src, .proc/endLaunch), pod.delays[POD_FALLING], TIMER_CLIENT_TIME) //Go onto the last step after a very short falling animation
@@ -633,6 +636,7 @@
 		var/obj/effect/supplypod_smoke/smoke_part = new (drop_location())
 		if (i == 1)
 			smoke_part.layer = FLY_LAYER
+			smoke_part.plane = ABOVE_GAME_PLANE
 			smoke_part.icon_state = "smoke_start"
 		smoke_part.transform = matrix().Turn(rotation)
 		smoke_effects[i] = smoke_part