revert: disable portuguese (#42508)

* revert: disable portuguese

First certification is not 100% yet. Shipped too soon. :(

* feat: enable portuguese curriculum

Curriculum can build in portuguese, leaving client disabled to
prevent language from appearing in nav bar.

* feat: move audited cert list

Moves the audited cert list to the config, instead of the utils.

config/i18n/all-langs.js

@@ -2,14 +2,7 @@
  * from the .env file aren't found in their respective arrays below
  */
 const availableLangs = {
-  client: [
-    'english',
-    'espanol',
-    'chinese',
-    'chinese-traditional',
-    'italian',
-    'portuguese'
-  ],
+  client: ['english', 'espanol', 'chinese', 'chinese-traditional', 'italian'],
   curriculum: [
     'english',
     'espanol',