[libc++] Look for Clang 17 when compiling clang-tidy checks

[philnik]

Summary

This allows compiling the clang-tidy checks when you only have ToT clang

[ldionne]

libcxx/test/tools/clang_tidy_checks/CMakeLists.txt

6–7

This is supported starting in CMake 3.19, and starting with LLVM 17 we support CMake >= 3.20.

[philnik]

Address comments

libcxx/test/tools/clang_tidy_checks/CMakeLists.txt

 
 # Look for the latest package
 set(CMAKE_FIND_PACKAGE_SORT_ORDER NATURAL)
 set(CMAKE_FIND_PACKAGE_SORT_DIRECTION DEC)
 
-find_package(Clang 16)
+find_package(Clang 16...17)
 
 set(SOURCES
     abi_tag_on_virtual.cpp
     hide_from_abi.cpp
     qualify_declval.cpp
     robust_against_adl.cpp
     uglify_attributes.cpp
 
     libcpp_module.cpp