This changes the way in which clang-cl is selected on Windows
as it has changed:
https://bazel.build/configure/windows#clang
--features=external_include_paths has been removed from Windows builds
since it appears cause build command errors currently
PiperOrigin-RevId: 596965732
Change-Id: I95b636a9a4fdcc4172c3bb8c6cb28d5f7db592c9
