Polling cleanup, fix PHP warnings (#13460)

* Fix warnings up to Arbos

* fixes a-c

* a-r

* a-vrp

* There and back again

* Update test data, couple fixes

* PHPSStan fixes

* style fixes, and fix Asyncos, whoops

* flip serial back.......

* less bogus data

* Poweralert sysName during polling too

* make sure things are calculated in the correct order

* fix style and bad nullables

* update test data

* A comple more conversions

* cambium ptp, misc, and hardware_mib

* remaining except vmware-esxi

* Fixes

* Update baseline

* fixes and fix up baseline

* adjust SnmpQueryMock to upstream options change

* data corrections

* restore slashes

* correctly handle all options input in SnmpQueryMock

* undo ftos changes

* restore vccodec sysDescr

LibreNMS/OS/Routeros.php

@@ -396,7 +396,7 @@ class Routeros extends OS implements
         return $sensors;
     }
 
-    public function pollOS()
+    public function pollOS(): void
     {
         $leases = snmp_get($this->getDeviceArray(), 'mtxrDHCPLeaseCount.0', '-OQv', 'MIKROTIK-MIB');