Merge pull request #162505 from cfhammill/cfh/fix-dvc-daemon-patch_157998

fix: dvc daemon patch, instantiate env to a copy of os.environ

pkgs/applications/version-management/dvc/dvc-daemon.patch

···
 -    file_path = os.path.abspath(inspect.stack()[0][1])
 -    env["PYTHONPATH"] = os.path.dirname(os.path.dirname(file_path))
 +    cmd = [ "@dvc@" , "daemon", "-q"] + args
-+    env = None
++    env = os.environ.copy()
      env[DVC_DAEMON] = "1"
  
      _spawn(cmd, env)