refactor: Introduce build aggregator #301

Job	Run time
Detect relevant changed files	5s
Build/Publish arm64 Image	7m 36s
Run cargo-udeps	2m 19s
Build/Publish amd64 Image	8m 31s
Publish/Sign 0.0.0-pr852 Index	33s
Package/Publish 0.0.0-pr852 Helm Chart	35s
Run OpenShift Preflight Check for 0.0.0-pr852-amd64	30s
Run OpenShift Preflight Check for 0.0.0-pr852-arm64	39s
Generate Provenance for 0.0.0-pr852 (quay.io) / detect-env	8s
Generate Provenance for 0.0.0-pr852 (oci.stackable.tech) / detect-env	5s
Generate Provenance for 0.0.0-pr852 (oci.stackable.tech) / generator	43s
Generate Provenance for 0.0.0-pr852 (quay.io) / generator	30s
Finished Build and Publish	4s
Generate Provenance for 0.0.0-pr852 (quay.io) / final	2s
Generate Provenance for 0.0.0-pr852 (oci.stackable.tech) / final	2s
Failure Notification	-1s
	22m 21s

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