feat: OPA Authorizer

[labrenbe]

Description

Adds support for authorization with OPA using Nifi OPA Plugin .

Tests passen on Openshift

--- PASS: kuttl (961.58s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/oidc-opa_nifi-1.28.1_zookeeper-latest-3.9.3_opa-latest-1.0.1_oidc-use-tls-true_openshift-false (406.42s)
        --- PASS: kuttl/harness/oidc-opa_nifi-1.27.0_zookeeper-latest-3.9.3_opa-latest-1.0.1_oidc-use-tls-false_openshift-false (418.03s)
        --- PASS: kuttl/harness/oidc-opa_nifi-1.28.1_zookeeper-latest-3.9.3_opa-latest-1.0.1_oidc-use-tls-false_openshift-false (249.60s)
        --- PASS: kuttl/harness/oidc-opa_nifi-2.4.0_zookeeper-latest-3.9.3_opa-latest-1.0.1_oidc-use-tls-true_openshift-false (267.88s)
        --- PASS: kuttl/harness/oidc-opa_nifi-2.4.0_zookeeper-latest-3.9.3_opa-latest-1.0.1_oidc-use-tls-false_openshift-false (217.25s)
        --- PASS: kuttl/harness/oidc-opa_nifi-1.27.0_zookeeper-latest-3.9.3_opa-latest-1.0.1_oidc-use-tls-true_openshift-false (265.99s)
PASS

Should not be merged before: stackabletech/docker-images#1058

Definition of Done Checklist

• Not all of these items are applicable to all PRs, the author should update this template to only leave the boxes in that are relevant
• Please make sure all these things are done and tick the boxes

# Author
- [X] Changes are OpenShift compatible
- [X] CRD changes approved
- [X] CRD documentation for all fields, following the [style guide](https://docs.stackable.tech/home/nightly/contributor/docs/style-guide).
- [X] Helm chart can be installed and deployed operator works
- [X] Integration tests passed (for non trivial changes)
- [X] Changes need to be "offline" compatible

# Reviewer
- [ ] Code contains useful comments
- [ ] Code contains useful logging statements
- [ ] (Integration-)Test cases added
- [ ] Documentation added or updated. Follows the [style guide](https://docs.stackable.tech/home/nightly/contributor/docs/style-guide).
- [ ] Changelog updated
- [ ] Cargo.toml only contains references to git tags (not specific commits or branches)

# Acceptance
- [ ] Feature Tracker has been updated
- [ ] Proper release label has been added
- [ ] [Roadmap](https://github.com/orgs/stackabletech/projects/25/views/1) has been updated

[maltesander]

first batch of comments

[maltesander]

I think we should already prepare a more extensive test environment.
Meaning having a couple of users in keycloak with different access in the regos that can be tested via API and easily extended?

[maltesander]

LGTM!