Fix animation looping bugs. (#29457)

Summary of the problem is in the corresponding engine commit: a4ea5a4620

This commit requires engine master right now.

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

Fixes #29144

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

Content.Client/Jittering/JitteringSystem.cs

@@ -48,6 +48,9 @@ namespace Content.Client.Jittering
             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);