Improved Latency graph (#15940)

* Improved Latency graph
Store loss+jitter info in rrd instead of database
New graph icmp_perf (legacy ping_perf still valid referencing part of the newer data)
Delete device_perf table

* Change loss to an area so it is more visible

* Style fixes

* Cleanups from phpstan & tests

* exit_code fix

* Remove alert usage of device_perf

* Don't use magic __get

* Add test for bulkPing
Add host to previous tests

* style fixes

* Fix issue fping error responses

app/Models/Device.php

@@ -839,11 +839,6 @@ class Device extends BaseModel
         return $this->belongsToMany(self::class, 'device_relationships', 'child_device_id', 'parent_device_id');
     }
 
-    public function perf(): HasMany
-    {
-        return $this->hasMany(\App\Models\DevicePerf::class, 'device_id');
-    }
-
     public function ports(): HasMany
     {
         return $this->hasMany(\App\Models\Port::class, 'device_id', 'device_id');