Make all doc fragments, module utils, and plugin utils private (#1144)

* Make all doc fragments, module utils, and plugin utils private.

* Remove some unused and no longer needed imports.

This hopefully also fixes the CI issues, which do not happen locally for me...

* Fix formatting.

* Try to make CI happy, again.

* Fix imports.

* Lint.

tests/unit/plugins/module_utils/compose_v2_test_cases.py

@@ -7,7 +7,7 @@ from __future__ import absolute_import, division, print_function
 
 __metaclass__ = type
 
-from ansible_collections.community.docker.plugins.module_utils.compose_v2 import (
+from ansible_collections.community.docker.plugins.module_utils._compose_v2 import (
     Event,
 )
 

tests/unit/plugins/module_utils/test__compose_v2.py

@@ -8,7 +8,7 @@ from __future__ import absolute_import, division, print_function
 __metaclass__ = type
 
 import pytest
-from ansible_collections.community.docker.plugins.module_utils.compose_v2 import (
+from ansible_collections.community.docker.plugins.module_utils._compose_v2 import (
     Event,
     parse_events,
 )
@@ -228,7 +228,11 @@ EXTRA_TEST_CASES = [
         "2.28.1",
         False,
         False,
-        " bash_1 Skipped \n" " bash_2 Pulling \n" " bash_2 Pulled \n",
+        # fmt: off
+        " bash_1 Skipped \n"
+        " bash_2 Pulling \n"
+        " bash_2 Pulled \n",
+        # fmt: on
         [
             Event(
                 "unknown",

tests/unit/plugins/module_utils/test__copy.py

@@ -8,7 +8,7 @@ from __future__ import absolute_import, division, print_function
 __metaclass__ = type
 
 import pytest
-from ansible_collections.community.docker.plugins.module_utils.copy import (
+from ansible_collections.community.docker.plugins.module_utils._copy import (
     _stream_generator_to_fileobj,
 )
 

tests/unit/plugins/module_utils/test__image_archive.py

@@ -10,7 +10,7 @@ __metaclass__ = type
 import tarfile
 
 import pytest
-from ansible_collections.community.docker.plugins.module_utils.image_archive import (
+from ansible_collections.community.docker.plugins.module_utils._image_archive import (
     ImageArchiveInvalidException,
     api_image_id,
     archived_image_manifest,

tests/unit/plugins/module_utils/test__util.py

@@ -8,7 +8,7 @@ from __future__ import absolute_import, division, print_function
 __metaclass__ = type
 
 import pytest
-from ansible_collections.community.docker.plugins.module_utils.util import (
+from ansible_collections.community.docker.plugins.module_utils._util import (
     compare_dict_allow_more_present,
     compare_generic,
     convert_duration_to_nanosecond,