Fix mistaken usage of info.block instead of level_info.block

Fixed an error on my part, in the last change I had mistakenly passed unadjusted block info into FullUploadSwizzles and UnswizzleImage

Revert (my mistaken changing of) the construction of SwizzleParameters in UnswizzleImage and FullUploadSwizzles to use level_info.block instead of info.block. This ensures that the block information used in the swizzling process is correctly adjusted for each mip level.