Bump version of main to 8.0.0; remove deprecations, deprecate some leftovers (#7358)

* Remove disable_facts from xfconf module.

* Remove deprecated module_helper CmdMixin and users.

* Deprecate ArgFormat as well, which wasn't explicitly deprecated yet.

* Remove state=get from gconftool2.

* Remove default of access_level in gitlab_runner.

* Remove state=list from manageiq_polices.

* Remove state=list from manageiq_tags.

* Consul: when state=absent, certain options can no longer be specified.

* Remove support for Ansible 2.9 and ansible-base 2.10 from ansible_galaxy_install.

* Bump community.general version to 8.0.0.

* Fix gconftool2 tests.

* Remove mh.mixins.cmd module_utils completely.

* Re-add removed anchor on its first non-removed usage.

* remove references in return doc, refactor method _setup210plus

* remove no longer needed check in function parse_check

* improve expression

* Fix YAML.

* Lint.

---------

Co-authored-by: Alexei Znamensky <russoz@gmail.com>

tests/unit/plugins/modules/test_gconftool2.yaml

@@ -4,28 +4,6 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 ---
-- id: test_simple_element_get
-  input:
-    state: get
-    key: /desktop/gnome/background/picture_filename
-  output: {}
-  run_command_calls:
-    - command: [/testbin/gconftool-2, --get, /desktop/gnome/background/picture_filename]
-      environ: &env-def {environ_update: {LANGUAGE: C, LC_ALL: C}, check_rc: true}
-      rc: 0
-      out: "100\n"
-      err: ""
-- id: test_simple_element_get_not_found
-  input:
-    state: get
-    key: /desktop/gnome/background/picture_filename
-  output: {}
-  run_command_calls:
-    - command: [/testbin/gconftool-2, --get, /desktop/gnome/background/picture_filename]
-      environ: *env-def
-      rc: 0
-      out: ""
-      err: "No value set for `/desktop/gnome/background/picture_filename'\n"
 - id: test_simple_element_set
   input:
     state: present
@@ -37,7 +15,7 @@
     changed: true
   run_command_calls:
     - command: [/testbin/gconftool-2, --get, /desktop/gnome/background/picture_filename]
-      environ: *env-def
+      environ: &env-def {environ_update: {LANGUAGE: C, LC_ALL: C}, check_rc: true}
       rc: 0
       out: "100\n"
       err: ""