errors-level logs to glitchtip

[diaasami]

Send error-level (and higher) log messages to sentry, this should log include HTTP 500 errors since we use log them as errors.
Follow up to #3907

This pull request includes:

• adequate testing for the new functionality or fixed issue
• adequate documentation informing people about the change such as
  • submit a PR for the guides repository if this PR changed any behavior described there: https://www.osbuild.org/guides/

[ondrejbudai]

Thanks!