Improve Snmpsim usage to ease testing (#15471)

* Snmpsim use python venv
Patch to enable listening while minimizing output
Update lnms dev:simulate, tests, and ./scripts/save-test-data.php
removed old option to start snmpsim from older scripts, use lnms dev:simulate

* Apply fixes from StyleCI

* various fixes

* Remove patch official package is updated

---------

Co-authored-by: StyleCI Bot <bot@styleci.io>

scripts/collect-snmp-data.php

@@ -5,7 +5,6 @@ use Illuminate\Support\Str;
 use LibreNMS\Exceptions\InvalidModuleException;
 use LibreNMS\Util\Debug;
 use LibreNMS\Util\ModuleTestHelper;
-use LibreNMS\Util\Snmpsim;
 
 $install_dir = realpath(__DIR__ . '/..');
 chdir($install_dir);
@@ -23,18 +22,11 @@ $options = getopt(
         'variant:',
         'file:',
         'debug',
-        'snmpsim',
         'full',
         'help',
     ]
 );
 
-if (isset($options['snmpsim'])) {
-    $snmpsim = new Snmpsim();
-    $snmpsim->run();
-    exit;
-}
-
 if (isset($options['v'])) {
     $variant = $options['v'];
 } elseif (isset($options['variant'])) {