move zabbix modules into their own namespace below monitoring/ (#31992)

.github/BOTMETA.yml

@@ -415,11 +415,12 @@ files:
   $modules/monitoring/stackdriver.py: bwhaley
   $modules/monitoring/statusio_maintenance.py: bhcopeland
   $modules/monitoring/uptimerobot.py: nate-kingsley
-  $modules/monitoring/zabbix_group.py: cove eikef harrisongu
-  $modules/monitoring/zabbix_host.py: cove eikef harrisongu D3DeFi
-  $modules/monitoring/zabbix_hostmacro.py: cave eikef
-  $modules/monitoring/zabbix_maintenance.py: abulimov eikef
-  $modules/monitoring/zabbix_screen.py: cove eikef harrisongu
+  $modules/monitoring/zabbix: eikef
+  $modules/monitoring/zabbix/zabbix_group.py: cove harrisongu
+  $modules/monitoring/zabbix/zabbix_host.py: cove harrisongu D3DeFi
+  $modules/monitoring/zabbix/zabbix_hostmacro.py: cave
+  $modules/monitoring/zabbix/zabbix_maintenance.py: abulimov
+  $modules/monitoring/zabbix/zabbix_screen.py: cove harrisongu
   $modules/net_tools/basics/get_url.py: jpmens
   $modules/net_tools/basics/slurp.py: $team_ansible
   $modules/net_tools/basics/uri.py: $team_ansible