Replace `const std::vector&` arguments with `std::span`

Because of this mistake, HoleInMaskMisalignedPageTable was testing the
same thing as MisalignedPageTable, which wasn't the intent.

Mistakenly, MISALIGNED_HOLE_MASK_PAGE_TABLE_BASE was aligned and
MISALIGNED_HOLE_MASK_PAGE_TABLE_BASE_ALIGNED was misaligned. It should
be the other way around.

These variables are unused due to a separate mistake which is corrected
in the next commit.

APPROVED_LIST_HASH is moved to a separate file, making tests compilation faster after changing it.
The error message prints the hash in a way that it can be directly copy-pasted (though it still needs clang-format).

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...)

Common: Replace Result with std::expected.