systemd - fix issue with capbpf and newer kernel (#72337)

A bug existed in systemd 245 that did not properly handle unknown kernel
capabilities gracefully. This resulted in incomplete output when querying
for the service status. It is possible to get service status by other means.
This PR works around this issue by getting service status using other commands
in the event of a failure due to this bug.

changelogs/fragments/71528-systemd-capbpf-workaround.yml

@@ -0,0 +1,4 @@
+bugfixes:
+  - >
+    systemd - work around bug with ``systemd`` 245 and 5.8 kernel that does not correctly
+    report service state (https://github.com/ansible/ansible/issues/71528)

lib/ansible/modules/systemd.py

@@ -400,6 +400,17 @@ def main():
                 # Check for loading error
                 if is_systemd and not is_masked and 'LoadError' in result['status']:
                     module.fail_json(msg="Error loading unit file '%s': %s" % (unit, result['status']['LoadError']))
+
+        # Workaround for https://github.com/ansible/ansible/issues/71528
+        elif err and rc == 1 and 'Failed to parse bus message' in err:
+            result['status'] = parse_systemctl_show(to_native(out).split('\n'))
+
+            (rc, out, err) = module.run_command("{systemctl} list-units '{unit}*'".format(systemctl=systemctl, unit=unit))
+            is_systemd = unit in out
+
+            (rc, out, err) = module.run_command("{systemctl} is-active '{unit}'".format(systemctl=systemctl, unit=unit))
+            result['status']['ActiveState'] = out.rstrip('\n')
+
         else:
             # list taken from man systemctl(1) for systemd 244
             valid_enabled_states = [