Fix asset bundle converter for wearables [blocks updating the ABConverter unless we don't use it for wearables]

When we refactored the GLTF Loading and ABConverter logic to use async-awaits @Kinerius manged to solve the importing of the assets, only 1 problem still persists and it's that converting wearable collections ends in a different result (amount of wearables, not sure if anything else) than converting in master branch.

At least in this master branch commit the new refactor was not yet merged and all the conversions work fine
This issue won't allow us to update the ab converter in the content migrator repo with the converter's latest changes unless we don't use that for wearables. Also if we have to convert wearables manually for an emergency we probably have to go back to the mentioned commit as well.

decentraland / unity-renderer

Fix asset bundle converter for wearables [blocks updating the ABConverter unless we don't use it for wearables] #1933