[VFX] Riot's Kayle's Blade VFX remain after being polimorphed by Lulu

Hi hi! Thanks for the report! This is an interesting one. Lulu herself is a pretty complex champion under the hood and is prone to doing this type of thing. ;-; Since this is a pretty strange edge case - in addition to being Polymorphed, Kayle also needs to have her E active during that time - it won't be prioritized alongside a major issue, but I can get it on our backlog for tracking. :)