refactor: OS Discovery files D-H (#4572)

* refactor: OS Discovery files D-H

* Combine edgeswitch check

* fix my typo

* update to fix tests

includes/discovery/os/foundryos.inc.php

@@ -9,9 +9,7 @@
  * option) any later version.  Please see LICENSE.txt at the top level of
  * the source code distribution for details.
  */
- 
-if (!$os) {
-    if (str_contains($sysDescr, 'Foundry Networks')) {
-        $os = 'foundryos';
-    }
+
+if (str_contains($sysDescr, 'Foundry Networks')) {
+    $os = 'foundryos';
 }