Yellow squiggly lines begone!
Done automatically on .cpp files through `run-clang-tidy`, with manual corrections to the mistakes.
If an import is directly used, but is technically unnecessary since it's recursively imported by something else, it is *not* removed.
The tool doesn't touch .h files, so I did some of them by hand while fixing errors due to old recursive imports.
Not everything is removed, but the cleanup should be substantial enough.
Because this done on Linux, code that isn't used on it is mostly untouched.
(Hopefully no open PR is depending on these imports...)

Followup to #10466. Resolves the following error:

ERROR: 0:85: '&' does not operate on 'uvec3' and 'int'

This will be used for later refactoring for increased accuracy.

The only remaining casts for these types that I know of are in TextureInfo (where format_name is set to the int version of the format, and since that affects filenames and probably would break resource packs, I'm not changing it) and in TextureDecoder_Common's TexDecoder_DrawOverlay, which will be handled separately.

VideoCommon: Fix D3D shader compilation warnings

Add abs() to fix "pow(f, e) will not work for negative f, use abs(f) or
conditionally handle negative values if you expect them".