[libc] [llvm] [libc] Migrate ctype_utils to use char instead of int where applicable. (PR #166225)

[Alexey Samsonov via llvm-commits]

vonosmas wrote:

Thank you for the review!

I've checked that the code is not is seemingly not pessimized by this change too much: https://godbolt.org/z/he31Mvfch (lookup table is still there).

https://github.com/llvm/llvm-project/pull/166225