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/_redfish.py

@@ -0,0 +1,36 @@
+# Copyright (c) 2025 Ansible community
+# 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
+
+# Note that this doc fragment is **PRIVATE** to the collection. It can have breaking changes at any time.
+# Do not use this from other collections or standalone plugins/modules!
+
+from __future__ import annotations
+
+
+class ModuleDocFragment:
+    # Use together with the community.general.redfish module utils' REDFISH_COMMON_ARGUMENT_SPEC
+    DOCUMENTATION = r"""
+options:
+  validate_certs:
+    description:
+      - If V(false), TLS/SSL certificates are not validated.
+      - Set this to V(true) to enable certificate checking. Should be used together with O(ca_path).
+    type: bool
+    default: false
+  ca_path:
+    description:
+      - PEM formatted file that contains a CA certificate to be used for validation.
+      - Only used if O(validate_certs=true).
+    type: path
+  ciphers:
+    required: false
+    description:
+      - TLS/SSL Ciphers to use for the request.
+      - When a list is provided, all ciphers are joined in order with V(:).
+      - See the L(OpenSSL Cipher List Format,https://www.openssl.org/docs/manmaster/man1/openssl-ciphers.html#CIPHER-LIST-FORMAT)
+        for more details.
+      - The available ciphers is dependent on the Python and OpenSSL/LibreSSL versions.
+    type: list
+    elements: str
+"""