Add LLVM 22 builds

[es1024]

Required changes:

• bump glog and gperftools to pick up patches there adding missing includes
• apply a patch to hwy. This patch is a modification of google/highway@16bbb82 modified for clang 22+ (see google/highway@4201022) needed because of [X86][AVX10] Remove EVEX512 and AVX10-256 implementations llvm/llvm-project#157034. Full patch of 4201022df1c66193863b7d58fea8ac899bd56c45 was not used because it's unnecessary and also requires other changes to be pulled in.
• -isystem $libcxx_installed_include flag changed from preprocessor to C++ flag, because it is not guaranteed to be C-compatible (gperftools in particular compiles some files with ANSI C, and clang 22 adds a comment that is compatible with ANSI C), and anyways just includes the underlying system include for C libraries anyways.
• min-supported macOS version checker skips libunwind, which is copied from the toolchain. The libunwind min version is actually slightly higher for clang22 due to libunwind requirements, but still below the lowest macOS version we support building for. But bumping or removing min version for thirdparty will break the build; we should fix this eventually.

clang19 builds were also removed.