refactor: Re-unify service disabling and stopping

Commit 8b6916a split the rsyslog.service disabling and stopping to
restrict the latter to booted environments. Use `omit` instead to
simplify.

Author: martinpitt

roles/rsyslog/tasks/main_core.yml

@@ -379,19 +379,11 @@
       systemd:
         name: rsyslog.service
         enabled: false
+        state: "{{ 'stopped' if __logging_is_booted else omit }}"
       when:
         - not __rsyslog_enabled | bool
         - not rsyslog_in_image | default(false) | bool
 
-    - name: Stop rsyslog service
-      systemd:
-        name: rsyslog.service
-        state: stopped
-      when:
-        - __logging_is_booted
-        - not __rsyslog_enabled | bool
-        - not rsyslog_in_image | default(false) | bool
-
 - name: Check rsyslog version
   debug:
     msg: "Rsyslog version must be >= 8.37.0-7.2"