Fix animation looping bugs. (space-wizards#29457)

Summary of the problem is in the corresponding engine commit: space-wizards/RobustToolbox@a4ea5a4

This commit requires engine master right now.

I think space-wizards#29144 is probably the most severe one, but I touched Jittering and RotatingLight too since they seemed sus too.

Fixes space-wizards#29144

Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Content.Client/Jittering/JitteringSystem.cs

@@ -48,6 +48,9 @@ private void OnAnimationCompleted(EntityUid uid, JitteringComponent jittering, A
             if(args.Key != _jitterAnimationKey)
                 return;
 
+            if (!args.Finished)
+                return;
+
             if (TryComp(uid, out AnimationPlayerComponent? animationPlayer)
                 && TryComp(uid, out SpriteComponent? sprite))
                 _animationPlayer.Play(uid, animationPlayer, GetAnimation(jittering, sprite), _jitterAnimationKey);

Content.Client/Light/EntitySystems/LightBehaviorSystem.cs

@@ -19,6 +19,9 @@ public override void Initialize()
 
     private void OnBehaviorAnimationCompleted(EntityUid uid, LightBehaviourComponent component, AnimationCompletedEvent args)
     {
+        if (!args.Finished)
+            return;
+
         var container = component.Animations.FirstOrDefault(x => x.FullKey == args.Key);
 
         if (container == null)

Content.Client/Light/EntitySystems/RotatingLightSystem.cs

@@ -69,6 +69,9 @@ private void OnAfterAutoHandleState(EntityUid uid, RotatingLightComponent comp,
 
     private void OnAnimationComplete(EntityUid uid, RotatingLightComponent comp, AnimationCompletedEvent args)
     {
+        if (!args.Finished)
+            return;
+
         PlayAnimation(uid, comp);
     }