refactor: Introduce build aggregator #322

Job	Run time
Detect relevant changed files	7s
Build/Publish amd64 Image	7m 45s
Run cargo-udeps	2m 4s
Build/Publish arm64 Image	6m 54s
Publish/Sign 0.0.0-pr841 Index	42s
Package/Publish 0.0.0-pr841 Helm Chart	29s
Run OpenShift Preflight Check for 0.0.0-pr841-amd64	37s
Run OpenShift Preflight Check for 0.0.0-pr841-arm64	32s
Generate Provenance for 0.0.0-pr841 (quay.io) / detect-env	6s
Generate Provenance for 0.0.0-pr841 (oci.stackable.tech) / detect-env	7s
Generate Provenance for 0.0.0-pr841 (quay.io) / generator	28s
Generate Provenance for 0.0.0-pr841 (oci.stackable.tech) / generator	26s
Generate Provenance for 0.0.0-pr841 (oci.stackable.tech) / final	3s
Finished Build and Publish	4s
Generate Provenance for 0.0.0-pr841 (quay.io) / final	4s
Failure Notification	-1s
	20m 27s

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