[clang] Reland [Driver] Add support for GCC installation detection in Baremetal toolchain (PR #144640)

[Garvit Gupta via cfe-commits]

quic-garvgupt wrote:

Fix for tests failing on https://lab.llvm.org/buildbot/#/builders/11 - https://github.com/llvm/llvm-project/pull/144655

https://github.com/llvm/llvm-project/pull/144640