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',

config/is-audited.js

@@ -0,0 +1,45 @@
+// this can go once all certs have been audited.
+
+// Currently the auditing is going through Crowdin, so once a cert has been 100%
+// proofread, we can add it in here. That means that translations can come
+// through from Crowdin whenever they are done, but we don't show them on the
+// client until we decide the entire cert is ready.
+
+// NOTE: certificates themselves (.yml files) are not currently being
+// translated, but when they are they can be included by adding 'certificates'
+// to the arrays below
+
+const auditedCerts = {
+  espanol: [
+    'responsive-web-design',
+    'javascript-algorithms-and-data-structures'
+  ],
+  chinese: [
+    'responsive-web-design',
+    'javascript-algorithms-and-data-structures',
+    'front-end-libraries',
+    'data-visualization',
+    'apis-and-microservices',
+    'quality-assurance'
+  ],
+  'chinese-traditional': [
+    'responsive-web-design',
+    'javascript-algorithms-and-data-structures',
+    'front-end-libraries',
+    'data-visualization',
+    'apis-and-microservices',
+    'quality-assurance'
+  ],
+  italian: [
+    'responsive-web-design',
+    'javascript-algorithms-and-data-structures'
+  ]
+};
+
+function isAuditedCert(lang, cert) {
+  if (!lang || !cert)
+    throw Error('Both arguments must be provided for auditing');
+  return lang === 'english' || auditedCerts[lang].includes(cert);
+}
+
+exports.isAuditedCert = isAuditedCert;