refactor: mark module_utils modules as private (#782)

##### SUMMARY

All `module_utils` are now marked as **private**. None of the modules
were intended for public use.

Similar to
https://togithub.com/ansible-collections/community.general/issues/11312

tests/unit/inventory/test_hcloud.py

@@ -4,7 +4,7 @@ import json
 from unittest.mock import MagicMock
 
 from plugins.inventory.hcloud import InventoryModule, first_ipv6_address
-from plugins.module_utils.vendor.hcloud.servers import BoundServer
+from plugins.module_utils._vendor.hcloud.servers import BoundServer
 
 
 def test_first_ipv6_address():

tests/unit/module_utils/test_deprecation.py

@@ -4,13 +4,14 @@ from datetime import datetime, timedelta, timezone
 from unittest import mock
 
 import pytest
-from ansible_collections.hetzner.hcloud.plugins.module_utils.deprecation import (
+
+from plugins.module_utils._deprecation import (
     deprecated_server_type_warning,
 )
-from ansible_collections.hetzner.hcloud.plugins.module_utils.vendor.hcloud.locations import (
+from plugins.module_utils._vendor.hcloud.locations import (
     BoundLocation,
 )
-from ansible_collections.hetzner.hcloud.plugins.module_utils.vendor.hcloud.server_types import (
+from plugins.module_utils._vendor.hcloud.server_types import (
     BoundServerType,
 )
 

tests/unit/module_utils/test_hcloud.py

@@ -4,11 +4,12 @@ import traceback
 from datetime import datetime, timezone
 
 import pytest
-from ansible_collections.hetzner.hcloud.plugins.module_utils.hcloud import AnsibleHCloud
-from ansible_collections.hetzner.hcloud.plugins.module_utils.vendor.hcloud import (
+
+from plugins.module_utils._base import AnsibleHCloud
+from plugins.module_utils._vendor.hcloud import (
     APIException,
 )
-from ansible_collections.hetzner.hcloud.plugins.module_utils.vendor.hcloud.actions import (
+from plugins.module_utils._vendor.hcloud.actions import (
     Action,
     ActionException,
     ActionFailedException,

tests/unit/module_utils/test_ssh.py

@@ -1,7 +1,8 @@
 from __future__ import annotations
 
 import pytest
-from ansible_collections.hetzner.hcloud.plugins.module_utils.ssh import (
+
+from plugins.module_utils._ssh import (
     ssh_public_key_md5_fingerprint,
 )
 

tests/utils/ci.sh

@@ -100,7 +100,7 @@ case "$test_name" in
   sanity)
     # shellcheck disable=SC2086
     ansible-test sanity --color -v \
-      --exclude plugins/module_utils/vendor/ \
+      --exclude plugins/module_utils/_vendor/ \
       --exclude scripts/ \
       --exclude tests/utils/ \
       --docker default \