[SDK-2869] Update Vanilla JS samples to use express-oauth2-jwt-bearer

[adamjmcgrath]

Vue one https://github.com/auth0-samples/auth0-vue-samples/pull/172

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. If you have not received a response for our team (apologies for the delay) and this is still a blocker, please reply with additional information or just a ping. Thank you for your contribution! 🙇‍♂️

[evansims]

@adamjmcgrath Did we still want to go this route? I can resolve the PR conflicts if so