Reload systemd config before systemctl start in upgrade

The systemd config needs to be reloaded between the config files
cleanup step and the service upgrade as that one starts contains a
systemctl start.

mgradm/shared/podman/podman.go

@@ -430,6 +430,10 @@ func Upgrade(
 		return err
 	}
 
+	if err := systemd.ReloadDaemon(false); err != nil {
+		return err
+	}
+
 	if err := updateServerSystemdService(); err != nil {
 		return err
 	}