refactor: Introduce build aggregator #294

Job	Run time
Detect relevant changed files	6s
Run cargo-udeps	2m 13s
Build/Publish amd64 Image	7m 50s
Build/Publish arm64 Image	7m 3s
Publish/Sign 0.0.0-pr801 Index	46s
Package/Publish 0.0.0-pr801 Helm Chart	35s
Run OpenShift Preflight Check for 0.0.0-pr801-amd64	26s
Run OpenShift Preflight Check for 0.0.0-pr801-arm64	42s
Generate Provenance for 0.0.0-pr801 (oci.stackable.tech) / detect-env	7s
Generate Provenance for 0.0.0-pr801 (quay.io) / detect-env	4s
Generate Provenance for 0.0.0-pr801 (quay.io) / generator	28s
Generate Provenance for 0.0.0-pr801 (oci.stackable.tech) / generator	31s
Generate Provenance for 0.0.0-pr801 (quay.io) / final	4s
Finished Build and Publish	2s
Generate Provenance for 0.0.0-pr801 (oci.stackable.tech) / final	3s
Failure Notification	0s
	21m 0s

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