feat: adding support to error handlers

[LeandroFranciscato]

Related Issue or Design Document

Design Document issue:
#69

stale old issue:
#41

user slack question with no answer:
https://ory-community.slack.com/archives/C01340V8KSM/p1681971583368289

Oathkeeper errror handlers doc:
https://www.ory.sh/docs/oathkeeper/pipeline/error

Checklist

• I have read the contributing guidelines and signed the CLA.
• I have referenced an issue containing the design document if my change introduces a new feature.
• I have read the security policy.
• I confirm that this pull request does not address a security vulnerability.
  If this pull request addresses a security vulnerability,
  I confirm that I got approval (please contact [email protected]) from the maintainers to push the changes.
• I have added tests that prove my fix is effective or that my feature works.
• I have added the necessary documentation within the code base (if appropriate).

Further comments

[CLAassistant]

All committers have signed the CLA.

[Demonsthere]

Thank you very much for your contribution! We know how frustrating it can be to have your issues/requests hang in a limbo but we are currently too understaffed to be able to actively update the project 😞.
I have no issues with the PR and we could merge/release it as is, but i will leave a few possible improvements that could make this more future proof.

[Demonsthere]

🙏

[Demonsthere]

The release CI failed due to outdated github credentials, but the image was pushed to dockerhub :) https://hub.docker.com/layers/oryd/oathkeeper-maester/v0.1.8/images/sha256-4ad8cacfff71d9cd54a4247e91e2bbc8be7ccc953b2569fa2d4cd0dc68ea152e?context=explore
We can now bump the image and CRD in the k8s repo

[LeandroFranciscato]

Cool.
I'm going to open the PR there.
Thank you.