Tweaked RA airfield + soviet barracks offsets

Barracks art is now more centered and aligned with allied tent. Airfield is now more centered, which also makes the custom spawn position obsolete and fixes the misalignment between spawn and landing position.

This is also done to reduce misalignment between art and footprint-sized hit shapes that will follow later.

mods/ra/rules/structures.yaml

@@ -1137,7 +1137,6 @@ AFLD:
 	RevealsShroud:
 		Range: 7c0
 	Exit@1:
-		SpawnOffset: 0,170,0
 		ExitCell: 1,1
 		Facing: 192
 		MoveIntoWorld: false

mods/ra/sequences/structures.yaml

@@ -152,11 +152,14 @@ apwr:
 barr:
 	idle:
 		Length: 10
+		Offset: 0,-6
 	damaged-idle:
 		Start: 10
 		Length: 10
+		Offset: 0,-6
 	make: barrmake
 		Length: *
+		Offset: 0,-6
 	bib: bib3
 		Length: *
 		UseTilesetExtension: true
@@ -283,22 +286,27 @@ afld:
 		Length: 8
 		Tick: 160
 		ZOffset: -1023
+		Offset: 0,-4
 	damaged-idle: afldidle
 		Start: 8
 		Length: 8
 		Tick: 160
 		ZOffset: -1023
+		Offset: 0,-4
 	active:
 		Length: 8
 		Tick: 160
 		ZOffset: -1023
+		Offset: 0,-4
 	damaged-active:
 		Start: 8
 		Length: 8
 		Tick: 160
 		ZOffset: -1023
+		Offset: 0,-4
 	make: afldmake
 		Length: *
+		Offset: 0,-4
 	icon: afldicon
 
 spen: