refactor: Introduce build aggregator #582

Job	Run time
Detect relevant changed files	9s
Build/Publish amd64 Image	7m 55s
Build/Publish arm64 Image	5m 14s
Run cargo-udeps	2m 5s
Publish/Sign 0.0.0-pr814 Index	54s
Package/Publish 0.0.0-pr814 Helm Chart	39s
Run OpenShift Preflight Check for 0.0.0-pr814-arm64	39s
Run OpenShift Preflight Check for 0.0.0-pr814-amd64	34s
Generate Provenance for 0.0.0-pr814 (oci.stackable.tech) / detect-env	8s
Generate Provenance for 0.0.0-pr814 (quay.io) / detect-env	7s
Generate Provenance for 0.0.0-pr814 (quay.io) / generator	25s
Generate Provenance for 0.0.0-pr814 (oci.stackable.tech) / generator	33s
Generate Provenance for 0.0.0-pr814 (quay.io) / final	4s
Finished Build and Publish	2s
Generate Provenance for 0.0.0-pr814 (oci.stackable.tech) / final	4s
Failure Notification	0s
	19m 32s

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