Merge llvm-project release/14.x llvmorg-14.0.0-2-g3f43d803382d

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-14.0.0-2-g3f43d803382d.

PR: 261742
MFC after: 2 weeks

(cherry picked from commit dbc822f3bc537e0d8350f63178397156bc163b1c)