Remove all hacks we had for a second shadow atlas for viewmodel shadows
Sharp viewmodel shadows prototype, remove last references to viewmodel atlas
Mixed lights support viewmodel shadows, recalculate frustum to always focus on the best alignment for the viewmodel bbox so it always stays sharp
https://cdn.discordapp.com/attachments/1118902360970899456/1119228713591132230/sbox_0031.mp4
SSAO test for viewmodel