Add WithHarvesterSpriteBody

And move PrefixByFullness there.
Also put it into Mods.Cnc, as RA is the only shipping mod
using this.

OpenRA.Mods.Common/UpdateRules/UpdatePath.cs

@@ -124,6 +124,7 @@ namespace OpenRA.Mods.Common.UpdateRules
 				new StreamlineRepairableTraits(),
 				new ReplaceSpecialMoveConsiderations(),
 				new RefactorHarvesterIdle(),
+				new SplitHarvesterSpriteBody(),
 			})
 		};