Make all doc fragments, module utils, and plugin utils private (#11896)

* Make all doc fragments private.

* Make all plugin utils private.

* Make all module utils private.

* Reformat.

* Changelog fragment.

* Update configs and ignores.

* Adjust unit test names.

tests/unit/plugins/module_utils/hwc/test_hwc_utils.py

@@ -1,38 +0,0 @@
-# Copyright (c) Ansible project
-# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-from __future__ import annotations
-
-import unittest
-
-from ansible_collections.community.general.plugins.module_utils.hwc_utils import HwcModuleException, navigate_value
-
-
-class HwcUtilsTestCase(unittest.TestCase):
-    def setUp(self):
-        super().setUp()
-
-    def test_navigate_value(self):
-        value = {
-            "foo": {
-                "quiet": {"tree": "test", "trees": [0, 1]},
-            }
-        }
-
-        self.assertEqual(navigate_value(value, ["foo", "quiet", "tree"]), "test")
-
-        self.assertEqual(navigate_value(value, ["foo", "quiet", "trees"], {"foo.quiet.trees": 1}), 1)
-
-        self.assertRaisesRegex(
-            HwcModuleException, r".* key\(q\) is not exist in dict", navigate_value, value, ["foo", "q", "tree"]
-        )
-
-        self.assertRaisesRegex(
-            HwcModuleException,
-            r".* the index is out of list",
-            navigate_value,
-            value,
-            ["foo", "quiet", "trees"],
-            {"foo.quiet.trees": 2},
-        )