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.

plugins/doc_fragments/attributes.py

@@ -1,89 +0,0 @@
-# Copyright (c) Ansible Project
-# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-from __future__ import annotations
-
-
-class ModuleDocFragment:
-    # Standard documentation fragment
-    DOCUMENTATION = r"""
-options: {}
-attributes:
-  check_mode:
-    description: Can run in C(check_mode) and return changed status prediction without modifying target.
-  diff_mode:
-    description: Returns details on what has changed (or possibly needs changing in C(check_mode)), when in diff mode.
-"""
-
-    PLATFORM = r"""
-options: {}
-attributes:
-  platform:
-    description: Target OS/families that can be operated against.
-    support: N/A
-"""
-
-    # Should be used together with the standard fragment
-    INFO_MODULE = r"""
-options: {}
-attributes:
-  check_mode:
-    support: full
-    details:
-      - This action does not modify state.
-  diff_mode:
-    support: N/A
-    details:
-      - This action does not modify state.
-"""
-
-    CONN = r"""
-options: {}
-attributes:
-  become:
-    description: Is usable alongside C(become) keywords.
-  connection:
-    description: Uses the target's configured connection information to execute code on it.
-  delegation:
-    description: Can be used in conjunction with C(delegate_to) and related keywords.
-"""
-
-    FACTS = r"""
-options: {}
-attributes:
-  facts:
-    description: Action returns an C(ansible_facts) dictionary that updates existing host facts.
-"""
-
-    # Should be used together with the standard fragment and the FACTS fragment
-    FACTS_MODULE = r"""
-options: {}
-attributes:
-  check_mode:
-    support: full
-    details:
-      - This action does not modify state.
-  diff_mode:
-    support: N/A
-    details:
-      - This action does not modify state.
-  facts:
-    support: full
-"""
-
-    FILES = r"""
-options: {}
-attributes:
-  safe_file_operations:
-    description: Uses Ansible's strict file operation functions to ensure proper permissions and avoid data corruption.
-"""
-
-    FLOW = r"""
-options: {}
-attributes:
-  action:
-    description: Indicates this has a corresponding action plugin so some parts of the options can be executed on the controller.
-  async:
-    description: Supports being used with the C(async) keyword.
-"""