fix: enable ESXi timesync only of vmware-toolbox-cmd is available

tasks/migrate_ntpd_to_esxi_timesync.yml

@@ -27,6 +27,9 @@
 
 - name: enable ESXi timesync if necessary
   shell: "/usr/bin/vmware-toolbox-cmd timesync enable"
-  when: >
-    ( timesync.stdout not in "Aktiviert" ) or
-    ( timesync.stdout not in "Enabled" )
+  when:
+    - ( timesync.stdout not in "Aktiviert" ) or
+      ( timesync.stdout not in "Enabled" )
+    - vmtools.stat.exists
+    - vmtools.stat.isreg
+    - vmtools.stat.xusr