Merge llvm-project main llvmorg-14-init-18294-gdb01b123d012
This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-14-init-18294-gdb01b123d012, the last commit before
the upstream release/14.x branch was created.
PR: 261742
MFC after: 2 weeks
(cherry picked from commit 1fd87a682ad7442327078e1eeb63edc4258f9815)