refactor: Introduce build aggregator #359

Job	Run time
Detect relevant changed files	8s
Run cargo-udeps	1m 55s
Build/Publish amd64 Image	8m 0s
Build/Publish arm64 Image	5m 11s
Package/Publish 0.0.0-pr726 Helm Chart	43s
Publish/Sign 0.0.0-pr726 Index	51s
Run OpenShift Preflight Check for 0.0.0-pr726-amd64	36s
Run OpenShift Preflight Check for 0.0.0-pr726-arm64	36s
Generate Provenance for 0.0.0-pr726 (quay.io) / detect-env	4s
Generate Provenance for 0.0.0-pr726 (oci.stackable.tech) / detect-env	4s
Generate Provenance for 0.0.0-pr726 (quay.io) / generator	28s
Generate Provenance for 0.0.0-pr726 (oci.stackable.tech) / generator	29s
Generate Provenance for 0.0.0-pr726 (quay.io) / final	4s
Generate Provenance for 0.0.0-pr726 (oci.stackable.tech) / final	4s
Finished Build and Publish	3s
Failure Notification	-1s
	19m 15s

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