These are not needed after #35129 but making uncrustify still play nice
with them was a bit tricky.

Unfortunately `uncrustify --update-config-with-doc` breaks strings
with backslashes. This issue has been reported upstream,
and in the meanwhile auto-update on every single run has been disabled.

Copy whatever was made to work for generated headers:

(1) we need to consider all cmake targets not just main_lib
(2) we need to add the sysroot for macOS

Work on https://github.com/neovim/neovim/issues/27004.

Problem:
Not all Lua code is checked by stylua. Automating code-style is an
important mechanism for reducing time spent on accidental
(non-essential) complexity.

Solution:
- Enable lintlua for `test/unit/` directory.
- TODO: only `test/functional/` remains unchecked.

previous: 45fe4d11add933df76a2ea4bf52ce8904f4a778b
previous: 517f0cc634b985057da5b95cf4ad659ee456a77e

test: replace lfs with luv

luv already pretty much does everything lfs does, so this duplication
of dependencies isn't needed.

This reverts commit ed11721b6bb36042ab065b5045c8eb01115b8902.

It broke multiple 32-bit builds and isn't actually required for building
in a true x86 32-bit environment.