Update monitoring stack to SDP 25.7 and scrape all products

[sbernauer]

This is a somewhat big PR, the monitoring stack rotted a bit over the last years and things broke.
This PR cleans everything up and achieves a better state than ever before :)
I now also took the time to look into ServiceMonitors and how they work, so we are able to scrape a lot more of products than before!

1. No need to update monitoring stack definition to SDP 25.7 (someone already YOLOed it here)
2. Switch to the new native metrics where possible. This obviously broke the Dashboards, so fixed them
3. Take the time to ensure all products are scraped. This required workarounds for some tools that mess up Services (e.g. kafka-op). Check that all products correctly expose metrics issues#747 will take care of cleaning up the mess. The only exclusions are spark and opensearch.
4. Use mTLS for NiFi 2. Related to Improve serving of NiFi 2 metrics nifi-operator#813
5. Tested that certificate rotation works for NiFi mTLS 🚀
6. Make sure all Dashboards work again with the new metric labels
7. Update MinIO dashboard to newest upsteam version, as it was broken
8. Added a simple Dashboard to get a quick overview if all products are scraped:

NiFi

Kafka