[9.0.0] Remove deprecated modules and features (#8198)

* Remove deprecated modules.

* Update BOTMETA.

* Update ignore.txt files.

* Bump collection version to 9.0.0.

* Change timeout from 10 to 60.

* Remove the alias autosubscribe of auto_attach.

* Change default of mode from compatibility to new.

* Remove deprecated classes.

* Remove mh.mixins.deps.DependencyMixin.

* Remove flowdock module.

* Remove proxmox_default_behavior option.

* Remove ack_* options.

* Remove deprecated command support.

* Change virtualenv behavior.

* Fix changelog.

* Remove imports of deprecated (and now removed) code.

* Fix tests.

* Fix sanity tests.

* Require Django 4.1.

* Use V() instead of C() for values.

Co-authored-by: Alexei Znamensky <103110+russoz@users.noreply.github.com>

* django_manage: improve docs for release 9.0.0

* markup

* fix doc notes in cpanm

---------

Co-authored-by: Alexei Znamensky <103110+russoz@users.noreply.github.com>
Co-authored-by: Alexei Znamensky <russoz@gmail.com>

plugins/modules/redhat_subscription.py

@@ -123,10 +123,9 @@ options:
         description:
             - Upon successful registration, auto-consume available subscriptions
             - |
-              Please note that the alias O(autosubscribe) will be removed in
+              Please note that the alias O(ignore:autosubscribe) was removed in
               community.general 9.0.0.
         type: bool
-        aliases: [autosubscribe]
     activationkey:
         description:
             - supply an activation key for use with registration
@@ -1106,17 +1105,7 @@ def main():
             'server_port': {},
             'rhsm_baseurl': {},
             'rhsm_repo_ca_cert': {},
-            'auto_attach': {
-                'type': 'bool',
-                'aliases': ['autosubscribe'],
-                'deprecated_aliases': [
-                    {
-                        'name': 'autosubscribe',
-                        'version': '9.0.0',
-                        'collection_name': 'community.general',
-                    },
-                ],
-            },
+            'auto_attach': {'type': 'bool'},
             'activationkey': {'no_log': True},
             'org_id': {},
             'environment': {},