Currently if a templaate referenced by the current page. is not found, then the templateAnnotaations endpoint will return a 404. Internally it errors out.

1. In this case, a message should be written to the log.
2. The annotaations endpoint should return a correct response with all of the components that have existing templates, so that the page can still render 
   1. For the component with no templaate - it could still return a node, but with some indicator that template xyz was not found. Then the frontend can render something if desired, but at very least developer can trace down the issue.

See research from Jaroslav:

https://magnolia-cms.slack.com/archives/CDGDQ4Y4E/p1661174000309829?thread_ts=1660914596.260419&cid=CDGDQ4Y4E