ErrorPage fails on getLocale() because i18n isn't initialized.

Description:

Some (maybe all?) MFEs have issues with ErrorPages and i18n.

The ErrorPage is invoked before either the Locale is set or Intl is initialized as a whole.

This should likely later be remediated in any MFEs that have this issue.

Repro Steps

1. Up devstack (im from REV so, we tend to grab lms+redis+ecommerce)
2. Once up, start Payment MFE (we dont use docker for this as there is an issue with the image we have yet to fix, its alo not germaine) npm ci && npm start
3. Stop LMS
4. Open Payment MFE in a Browser http://localhost:1998/

Technical/Additional Details

Specific Error: getLocale called before configuring i18n. Call configure with messages first.
Stack Trace:

Call Stack
 getLocale
  node_modules/@edx/frontend-platform/i18n/lib.js:273:11
 ErrorPage
  node_modules/@edx/frontend-platform/react/ErrorPage.js:82:115
 renderWithHooks
  node_modules/react-dom/cjs/react-dom.development.js:14803:18
 mountIndeterminateComponent
  node_modules/react-dom/cjs/react-dom.development.js:17482:13
 beginWork
  node_modules/react-dom/cjs/react-dom.development.js:18596:16
 HTMLUnknownElement.callCallback
  node_modules/react-dom/cjs/react-dom.development.js:188:14
 Object.invokeGuardedCallbackDev
  node_modules/react-dom/cjs/react-dom.development.js:237:16
 invokeGuardedCallback
  node_modules/react-dom/cjs/react-dom.development.js:292:31
 beginWork$1
  node_modules/react-dom/cjs/react-dom.development.js:23203:7
 performUnitOfWork
  node_modules/react-dom/cjs/react-dom.development.js:22154:12

Code Ptr (ErrorPage initialization point): https://github.com/openedx/frontend-template-application/blob/master/src/index.jsx#L28

Community Example (learner MFE): https://discuss.openedx.org/t/when-attempting-to-enter-a-courses-home-on-learning-mfe-error-getlocale-called-before-configuring-i18n/9756/1

Start at src/index.jsx, especially the ErrorPage initialization point, then inspect ErrorPage.js and the getLocale call in @edx/frontend-platform/i18n/lib.js. Reproduce the failure by stopping LMS and opening the Payment MFE at http://localhost:1998/. Done means ErrorPage no longer fails when i18n has not yet been configured.