Refactor MAC utilities into a single class (#15379)

* Refactor MAC utils to a new utility class

* Apply fixes from StyleCI

* Inline functions
Add tests
Handle bridgeid format

* Apply fixes from StyleCI

* Dedicated code path for stp bridge parsing, and improve STP output a bit

* Correctly parse dot1dBaseBridgeAddress and don't store int in bool field

* trim any unexpected character from bridge addresses, add extra test data.

* better comment

* barsBridge can handle dot1dBaseBridgeAddress correctly now

* parseBridge, check for properly formatted mac first.

* update test data, empty data = empty mac

* Fix new usage after rebase

* import

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

tests/FunctionsTest.php

@@ -27,16 +27,10 @@ namespace LibreNMS\Tests;
 
 use LibreNMS\Device\YamlDiscovery;
 use LibreNMS\Util\Number;
-use LibreNMS\Util\Rewrite;
 use LibreNMS\Util\Time;
 
 class FunctionsTest extends TestCase
 {
-    public function testMacCleanToReadable(): void
-    {
-        $this->assertEquals('de:ad:be:ef:a0:c3', Rewrite::readableMac('deadbeefa0c3'));
-    }
-
     public function testHex2Str(): void
     {
         $this->assertEquals('Big 10 UP', hex2str('426967203130205550'));