[LinkerWrapper] Add support for --no-canonical-prefixes
This is necessary to support build environments where the
compiler/associated tools are actually just symlinks into a CAS. Without
this, we try and resolve binaries relative to the real path of
clang-linker-wrapper, which is usually in a directory prefixed with the
first couple characters of a SHA digest and named with a SHA digest. We
also need to ensure that we propagate --no-canonical-prefixes to sub
clang invocations so that clang is able to resolve lld in such
environments.
Reviewers: jhuber6, Artem-B, sarnex
Pull Request: https://github.com/llvm/llvm-project/pull/184160
