Fix check mode in iptables_state for incomplete iptables-save files along with integration tests (#8029)

* Implement integration test to reproduce #7463

* Make new iptables_state checks async

* Add missing commit to iptable_state integration test

* Remove async when using checkmode in iptables_state integration tests

* Do per table comparison in check mode for iptables_state

* Calculate changes of iptables state per table based on result

* Output target iptables state in checkmode

* Refactor calculation of invidual table states in iptables_state

* Add missing return for table calculation

* Add missing arg to regex check

* Remove leftover debug output for target iptable state

* Parse per table state from raw state string

* Join restored state for extration of table specific rules

* Switch arguments for joining restored iptable state

* Output final ip table state

* Compare content of tables

* Complete iptables partial tables test cases

* Correct order of test iptables data

* Update docu for iptables tables_after

* Add changelog fragment

* Appease the linting gods for iptables_state

* Adjust spelling and remove tables_after from return values

tests/integration/targets/iptables_state/tasks/main.yml

@@ -29,6 +29,12 @@
       when:
         - xtables_lock is undefined
 
+    - name: include tasks to test partial restore files
+      include_tasks: tests/02-partial-restore.yml
+      when:
+        - xtables_lock is undefined
+
+
     - name: include tasks to test rollbacks
       include_tasks: tests/10-rollback.yml
       when: