new sensors for siteboss OS + new sensor type: percentage (%) (#11958)

* split siteboss 530 and 550 into multiple OS

* add more sensors to siteboss550 and new Percent sensor

* fix contact closure event state values

* split os polling for siteboss to siteboss530 and siteboss550

* add test unit for siteboss550, rename test unit for siteboss to siteboss530

* refactor siteboss os polling to \Librenms\OS

* implement OSPolling to Sitebos550

* force save in pollOS() to keep custom sysName during polling

* updated unit test

* update device graphs

* remove pollOS and extra save()

* siteboss550 no longer extends OSPolling

* update siteboss550 test data

* update discoverOS() to match recent os discovery changes

* styleCI changes

* fix siteboss hardware discovery; add check to OS polling if os_group .inc file exists

* collapse siteboss to single OS, implement siteboss sensors in advanced discovery

* add siteboss unit tests

* removed unneeded OS disco defs

* styleCI changes

* more styleCI changes

* split siteboss os to siteboss530 and siteboss550

* split siteboss os to siteboss530 and siteboss550

* move php polling back into yaml

* keep original siteboss OS name

* resave snmp data for siteboss OS

* resave snmp data for siteboss550 OS

resources/lang/en/sensors.php

@@ -173,4 +173,10 @@ return [
         'unit' => 'l/m',
         'unit_long' => 'Liters Per Minute',
     ],
+    'percent' => [
+        'short' => 'Percent',
+        'long' => 'Percent',
+        'unit' => '%',
+        'unit_long' => 'Percent',
+    ],
 ];