refactor: Introduce build aggregator (#776) #294

Job	Run time
Detect relevant changed files	4s
Build/Publish arm64 Image	7m 4s
Run cargo-udeps	1m 50s
Build/Publish amd64 Image	7m 43s
Package/Publish 0.0.0-dev Helm Chart	42s
Publish/Sign 0.0.0-dev Index	53s
Run OpenShift Preflight Check for 0.0.0-dev-amd64	41s
Run OpenShift Preflight Check for 0.0.0-dev-arm64	44s
Generate Provenance for 0.0.0-dev (oci.stackable.tech) / detect-env	4s
Generate Provenance for 0.0.0-dev (quay.io) / detect-env	3s
Generate Provenance for 0.0.0-dev (quay.io) / generator	21s
Generate Provenance for 0.0.0-dev (oci.stackable.tech) / generator	44s
Generate Provenance for 0.0.0-dev (quay.io) / final	2s
Finished Build and Publish	4s
Generate Provenance for 0.0.0-dev (oci.stackable.tech) / final	3s
Failure Notification	-1s
	21m 1s

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