Add external links override support (#2730)

* feat: add external links override support

* fix: add note, fix 404 url and fix unrelated typo

* test: fix

plugins/course-apps/live/BBBSettings.jsx

@@ -1,5 +1,5 @@
 import React, { useEffect, useState } from 'react';
-import { getConfig } from '@edx/frontend-platform';
+import { getConfig, getExternalLinkUrl } from '@edx/frontend-platform';
 import { FormattedMessage, useIntl } from '@edx/frontend-platform/i18n';
 import { Form, Hyperlink } from '@openedx/paragon';
 import PropTypes from 'prop-types';
@@ -93,7 +93,7 @@ const BbbSettings = ({
               <span data-testid="free-plan-message">
                 {intl.formatMessage(messages.freePlanMessage)}
                 <Hyperlink
-                  destination="https://bigbluebutton.org/privacy-policy/"
+                  destination={getExternalLinkUrl('https://bigbluebutton.org/privacy-policy/')}
                   target="_blank"
                   rel="noopener noreferrer"
                   showLaunchIcon

plugins/course-apps/xpert_unit_summary/settings-modal/SettingsModal.jsx

@@ -1,4 +1,5 @@
 import { useIntl } from '@edx/frontend-platform/i18n';
+import { getExternalLinkUrl } from '@edx/frontend-platform';
 import {
   ActionRow,
   Alert,
@@ -276,7 +277,7 @@ const SettingsModal = ({
     <div className="py-1">
       <Hyperlink
         className="text-primary-500"
-        destination="https://openai.com/api-data-privacy"
+        destination={getExternalLinkUrl('https://openai.com/api-data-privacy')}
         target="_blank"
         rel="noreferrer noopener"
       >