TNL-782 use JWT ID-Token for authentication annotation requests

supersedes https://github.com/edx/edx-platform/pull/6125, since `anton/edxnotes-search` has been merged into `feature/edxnotes`
approved by @jimabramson

https://openedx.atlassian.net/browse/TNL-782

@polesye @olmar @jmclaus