Tracking: OIDC support

[Techassi]

This issue tracks the implementation of OIDC support across the SDP.

### General Tasks
- [ ] https://github.com/stackabletech/operator-rs/pull/680
- [ ] https://github.com/stackabletech/documentation/pull/460
- [ ] https://github.com/stackabletech/commons-operator/pull/186

### Create stack
- [ ] Set up stack using Keycloak with https and sample users + clients for every data product we use in the stacks + demos + client for userinfofetcher
- [ ] Deploy OPA with userinfofetcher
- [ ] Deploy Trino using OIDC
- [ ] Deploy Superset using OIDC
- [ ] Deploy Druid using OIDC

### Operator Tasks
- [ ] https://github.com/stackabletech/kafka-operator/issues/630
- [ ] https://github.com/stackabletech/opa-operator/pull/433
- [ ] https://github.com/stackabletech/commons-operator/pull/187
- [ ] https://github.com/stackabletech/trino-operator/pull/501
- [ ] https://github.com/stackabletech/trino-operator/issues/473
- [ ] https://github.com/stackabletech/superset-operator/issues/405
- [ ] https://github.com/stackabletech/superset-operator/pull/423
- [ ] https://github.com/stackabletech/airflow-operator/issues/337
- [ ] https://github.com/stackabletech/nifi-operator/issues/633
- [ ] https://github.com/stackabletech/druid-operator/issues/473

[fhennig]

I had this one before: #431 (for context)

[Techassi]

Oh you are right. Let me merge some of the contents then.