Added detection for Zyxel GESxxx G.fast DPUs (librenms#18293)

* Added GES to sysDescr_regex

* Adding Test Data

* Added zynos_ges1316.json

Author: nhnetsolutions

resources/definitions/os_detection/zynos.yaml

@@ -13,6 +13,7 @@ discovery:
         sysDescr_regex:
             - '/^ES/'
             - '/^GS/'
+            - '/^GES/'
             - '/^MES/'
             - '/^MGS/'
             - '/^XS/'