refactor: Introduce build aggregator #339

Job	Run time
Detect relevant changed files	7s
Run cargo-udeps	2m 29s
Build/Publish amd64 Image	8m 6s
Build/Publish arm64 Image	7m 4s
Package/Publish 0.0.0-pr726 Helm Chart	48s
Publish/Sign 0.0.0-pr726 Index	33s
Run OpenShift Preflight Check for 0.0.0-pr726-amd64	27s
Run OpenShift Preflight Check for 0.0.0-pr726-arm64	38s
Generate Provenance for 0.0.0-pr726 (quay.io) / detect-env	7s
Generate Provenance for 0.0.0-pr726 (oci.stackable.tech) / detect-env	4s
Generate Provenance for 0.0.0-pr726 (oci.stackable.tech) / generator	32s
Generate Provenance for 0.0.0-pr726 (quay.io) / generator	28s
Finished Build and Publish	4s
Generate Provenance for 0.0.0-pr726 (oci.stackable.tech) / final	3s
Generate Provenance for 0.0.0-pr726 (quay.io) / final	4s
Failure Notification	0s
	21m 34s

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