[BUG] uploadAnimation(data, itemOptions, assetId) no longer works due to closed endpoint.

[iiPotatoFlamesii]

Describe the bug
uploadAnimation(data, itemOptions, assetId) no longer works correctly when using assetId to overwrite/update an existing animation. The roblox.com/ide/publish/uploadexistinganimation endpoint seems to have been shutdown.

To Reproduce
Steps to reproduce the behavior:

1. Login with Cookie
2. Call uploadAnimation with a proper data buffer and assetId; itemOptions aren't required
3. Error occurs

Additional context
Further study shows that the roblox.com/ide/publish/uploadexistinganimation endpoint is returning 404 errors. I personally have tried multiple other endpoints for overwriting/updating existing animations, but none work. Most return a 500 error, but some will return a 400 error saying that the asset type isn't allowed.

My best guess is that Roblox switched to a different uploading endpoint for overwriting animations, and likely will have to be pulled from Studio in order to get the new endpoint.