refactor: Introduce build aggregator #335

Job	Run time
Detect relevant changed files	6s
Build/Publish amd64 Image	7m 57s
Run cargo-udeps	2m 2s
Build/Publish arm64 Image	7m 54s
Package/Publish 0.0.0-pr985 Helm Chart	34s
Publish/Sign 0.0.0-pr985 Index	37s
Run OpenShift Preflight Check for 0.0.0-pr985-amd64	34s
Run OpenShift Preflight Check for 0.0.0-pr985-arm64	27s
Generate Provenance for 0.0.0-pr985 (quay.io) / detect-env	4s
Generate Provenance for 0.0.0-pr985 (oci.stackable.tech) / detect-env	7s
Generate Provenance for 0.0.0-pr985 (quay.io) / generator	22s
Generate Provenance for 0.0.0-pr985 (oci.stackable.tech) / generator	38s
Generate Provenance for 0.0.0-pr985 (quay.io) / final	4s
Finished Build and Publish	3s
Generate Provenance for 0.0.0-pr985 (oci.stackable.tech) / final	2s
Failure Notification	0s
	21m 31s

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