Refs 3898: add error log endpoint for UI glitchtip

[rverdile]

Summary

Adds an endpoint that logs the error sent to it, so that the frontend can send errors to it, and we can get glitchtip notifications for those errors

See content-services/content-sources-frontend#296

POST request to /content-sources/v1/log_error

with the body

{
    "error_title": "UI error",
    "error_details": "an error has occurred [might include stack trace]"
}

Testing steps

1. Send a POST request with the body above to the new endpoint
2. In the terminal, you should see an error log

Checklist

• Tested with snapshotting feature disabled and pulp server URL not configured if appropriate

[jlsherrill]

https://issues.redhat.com/browse/HMS-3898

[jlsherrill]

⚠️ This task currently requires qe-approval, but this PR does not fully resolve the task. Please contact QE to determine appropriate testing required.

[rverdile]

closing in favor of waiting for official support