pacemaker_cluster: enhancements and add unit tests (#10227)

* feat(initial): Add unit tests and rewrite pacemaker_cluster

This commit introduces unit tests and pacemaker_cluster module rewrite
to use the pacemaker module utils.

* feat(cleanup): Various fixes and add resource state

This commit migrates the pacemaker_cluster's cleanup state to the
pacemaker_resource module. Additionally, the unit tests for
pacemaker_cluster have been corrected to proper mock run command order.

* doc(botmeta): Add author to pacemaker_cluster

* style(whitespace): Cleanup test files

* refactor(cleanup): Remove unused state value

* bug(fix): Parse apply_all as separate option

* refactor(review): Apply code review suggestions

This commit refactors breaking changes in pacemaker_cluster module into
deprecated features. The following will be scheduled for deprecation:
`state: cleanup` and `state: None`.

* Apply suggestions from code review

Co-authored-by: Felix Fontein <felix@fontein.de>

* refactor(review): Additional review suggestions

* refactor(deprecations): Remove all deprecation changes

* refactor(review): Enhance rename changelog entry and fix empty string logic

* refactor(cleanup): Remove from pacemaker_resource

* Apply suggestions from code review

Co-authored-by: Felix Fontein <felix@fontein.de>

* refactor(review): Add changelog and revert required name

* revert(default): Use default state=present

* Update changelogs/fragments/10227-pacemaker-cluster-and-resource-enhancement.yml

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update changelog fragment.

---------

Co-authored-by: Felix Fontein <felix@fontein.de>

changelogs/fragments/10227-pacemaker-cluster-and-resource-enhancement.yml

@@ -0,0 +1,7 @@
+deprecated_features:
+  - pacemaker_cluster - the parameter ``state`` will become a required parameter in community.general 12.0.0 (https://github.com/ansible-collections/community.general/pull/10227).
+
+minor_changes:
+  - pacemaker_cluster - add ``state=maintenance`` for managing pacemaker maintenance mode (https://github.com/ansible-collections/community.general/issues/10200, https://github.com/ansible-collections/community.general/pull/10227).
+  - pacemaker_cluster - rename ``node`` to ``name`` and add ``node`` alias (https://github.com/ansible-collections/community.general/pull/10227).
+  - pacemaker_resource - enhance module by removing duplicative code (https://github.com/ansible-collections/community.general/pull/10227).