move environment to helpers module

This fixes registering pytest plugins

pkgs/clan-cli/tests/conftest.py

@@ -0,0 +1,2 @@
+import os
+sys.path.append(os.path.join(os.path.dirname(__file__), 'helpers'))

pkgs/clan-cli/tests/test_clan_ssh.py

@@ -3,12 +3,11 @@ from typing import Union
 
 import pytest
 import pytest_subprocess.fake_process
+from environment import mock_env
 from pytest_subprocess import utils
 
 import clan_cli.ssh
 
-from .environment import mock_env
-
 
 def test_no_args(
     capsys: pytest.CaptureFixture, monkeypatch: pytest.MonkeyPatch