refs #18951 [fid_bbi] activate BOSS feature and fix module's Resolver config

* now uses fid instance of Ezb

module/fid_bbi/config/module.config.php

@@ -104,11 +104,6 @@ $config = [
                     'fid_bbi\Db\Row\Tags' => BaseTagsRow::class,
                     'fid_bbi\Db\Row\ResourceTags' => 'VuFind\Db\Row\ResourceTags'
                 ]
-            ],
-            'resolver_driver' => [
-                'aliases' => [
-                    'ezb' => 'finc\Resolver\Driver\Ezb'
-                ]
             ]
         ],
         'recorddriver_tabs'            => [

themes/fid_bbi/theme.config.php

@@ -9,6 +9,7 @@ return [
     ],
     'mixins' => [
         'worldcat',
+        'boss'
     ],
     'helpers' => array(
         'aliases' => [