docs: Deprecate Apache Druid #339

Job	Run time
Detect relevant changed files	8s
Run cargo-udeps	0s
Build/Publish ${{ matrix.runner.arch }} Image	0s
Publish/Sign ${{ needs.build-container-image.outputs.operator-version }} Index	0s
Package/Publish ${{ needs.build-container-image.outputs.operator-version }} Helm Chart	0s
Generate Provenance for (oci.stackable.tech)	0s
Generate Provenance for (quay.io)	0s
Run OpenShift Preflight Check for ${{ needs.build-container-image.outputs.operator-version }}-${{ matrix.arch }}	0s
Finished Build and Publish	-1s
Failure Notification	-1s
	6s

Provide feedback