Create a `BuildProcess` instance.

def create_build_process(process_type, working_dir, build_system, package=None,
                         vcs=None, ensure_latest=True, skip_repo_errors=False,
                         ignore_existing_tag=False, verbose=False, quiet=False):
    """Create a `BuildProcess` instance."""
    from rez.plugin_managers import plugin_manager
    process_types = get_build_process_types()
    if process_type not in process_types:
        raise BuildProcessError("Unknown build process: %r" % process_type)

    cls = plugin_manager.get_plugin_class('build_process', process_type)

    return cls(working_dir,  # ignored (deprecated)
               build_system,
               package=package,  # ignored (deprecated)
               vcs=vcs,
               ensure_latest=ensure_latest,
               skip_repo_errors=skip_repo_errors,
               ignore_existing_tag=ignore_existing_tag,
               verbose=verbose,
               quiet=quiet)