[FIXED] [G'huun] Collapse Overlap + Knockback mechanic

[FreakzStaff]

***The below should apply on all difficulties as the mechanics are unchanged, the damage is the only change between Normal, Heroic, and Mythic, and that works correctly.***

The ***first issue*** with [Collapse](https://www.wow-freakz.com/spells.php?spell=276839&name=collapse) is the overlapping and incorrect timing of the spell. Providing details below of the sequences and videos for comparison. Please excuse if there are milliseconds difference, it's for reference of how the spell works.

Collapse on ***RETAIL*** starts with 20-second channeling. at 15seconds remaining the first visual of Collapse is on the floor, the damage and knockback + collapse end animation are at 11.1 seconds remaining, at 9.6s the second collapse animation starts and knockbacks + damage at 3.7s remaining of cast time, final collapse cast happens at 1.7s seconds remaining, with the effect that knockbacks + damage happens 4 seconds after the cast has finished.
[Retail Video]( https://youtube.com/watch?v=m_yYLqV15vM&t=291:

)

Collapse on ***FREAKZ*** starts with 20-second channeling, at 16.7seconds remaining the first visual of Collapse is on the floor, at 13.6 seconds remaining the second visual is on the floor, at 10.9seconds remaining the first collapse damage + knockback happens, followed by the second collapse knockback and damage at 8.4 seconds remaining, the third collapse animation starts at 2.3 seconds remaining and hits the floor and knockbacks and damage 4 seconds after the cast has ended.
[Freakz Video](https://streamable.com/hcgjhn)

The ***second issue*** with [Collapse](https://www.wow-freakz.com/spells.php?spell=276839&name=collapse) is the knockback effect, which is way overturned on Freakz, it is merely a slight pushback on Retail, I'm providing videos below to see and compare.

At the moment on Freakz the knockback will send you to the nearest wall most of the cases, here's a video.
[Video 1](https://streamable.com/lvwwie)
[Video 2](https://streamable.com/hcgjhn)

On Retail, the knockback effect is almost unnoticeable and is just a slight body pushback.
[Pushback Mythic Retail]( https://youtube.com/watch?v=xYJkKiq1bhI&t=386:

)
[Pushback Heroic Retail]( https://youtube.com/watch?v=bWAytp9VSF0&t=283:

)
[Pushback Normal Retail]( https://youtube.com/watch?v=ufiqjDBrHLM&t=325:

)


Trello Card Link : https://trello.com/c/3mJtK9WW/410-ghuun-collapse-overlap-knockback-mechanic