Connectivity Helper to check and record device reachability (#13315)

* Fping WIP

* Update availability, move ping rrd update in the same place as db update.

* move classes around

* make device:ping command work

* use new code, remove legacy code

* save metrics boolean prevents all saves
style fixes

* update device array

* style fixes

* Update unit test

* fix whitespace

* Fix Fping stub

* fix backwards if

* fix phpstan complaining

* Fix return type

* add fillable to DeviceOutage model.

* device_outage migration to add id...

* missed line in db_schema.yaml

* 1 billion more comments on the brain damage up/down code

* tests for status and status_reason fields

* fix style again :D

* Duplicate legacy isSNMPable() functionality
but with only one snmp call ever 😎

* Remove unused variable

* fix migrations for sqlite

tests/OSModulesTest.php

@@ -28,9 +28,10 @@ namespace LibreNMS\Tests;
 use DeviceCache;
 use Illuminate\Foundation\Testing\DatabaseTransactions;
 use LibreNMS\Config;
+use LibreNMS\Data\Source\Fping;
+use LibreNMS\Data\Source\FpingResponse;
 use LibreNMS\Exceptions\FileNotFoundException;
 use LibreNMS\Exceptions\InvalidModuleException;
-use LibreNMS\Fping;
 use LibreNMS\Util\Debug;
 use LibreNMS\Util\ModuleTestHelper;
 
@@ -172,17 +173,8 @@ class OSModulesTest extends DBTestCase
         });
 
         $this->app->bind(Fping::class, function ($app) {
-            $mock = \Mockery::mock('\LibreNMS\Fping');
-            $mock->shouldReceive('ping')->andReturn([
-                'xmt' => 3,
-                'rcv' => 3,
-                'loss' => 0,
-                'min' => 0.62,
-                'max' => 0.93,
-                'avg' => 0.71,
-                'dup' => 0,
-                'exitcode' => 0,
-            ]);
+            $mock = \Mockery::mock('\LibreNMS\Data\Source\Fping');
+            $mock->shouldReceive('ping')->andReturn(FpingResponse::artificialUp());
 
             return $mock;
         });