feat: Add linux-arm64 support

[Lego-Fan9]

This PR does 3 things.

1. Updates the version of AssetStudio used, adding the binaries needed for linux-arm64
2. Changes the logic of how it checks that Texture2DDecoderNative exists. Instead of checking for the file to exist, it loads the library then disposes it. This matches what AssetStudio does at runtime.
3. Removes 3 copies of Texture2DDecoderNative that were in the x64 and x86 folders (linux-x64, win-x64, win-x32). These binaries should never have been loaded at runtime. The binaries that it loads for portable builds are at runtimes/<rid>/native, for platform specific it is placed at the project root. This is handled by AssetStudioUtility and it pulls the binaries from NuGet.

[Lego-Fan9]

I made that second commit to get rid of the function that checks if the texture decoder lib exists. It is kinda unnecessary because it is done later on in Texture2DDecoderWrapper (part of AssetStudio) and throws the same exceptions