Multi-platform for SDP

This status is still experimental, as we work to fine-tune the necessary workflows.

Description

Starting with Stackable release 24.7, all images are multi-platform images, supporting the AMD64 and ARM64 architectures. Each product image is built for each platform with an architecture-specific tag. For example, the Airflow images with tags airflow:2.9.2-stackable24.7.0-amd64 and airflow:2.9.2-stackable24.7.0-arm64 are bundled in the manifest list airflow:2.9.2-stackable24.7.0 using an automated workflow. The appropriate image will then be transparently selected for the active platform/architecture. This also enables mixed Kubernetes clusters, with AMD64 and ARM64 nodes being used simultaneously.

Superset 2.x (deprecated, and to be removed in a future version) is not available as a multi-platform product image.