refactor: Introduce build aggregator #292

Job	Run time
Detect relevant changed files	7s
Build/Publish amd64 Image	7m 19s
Build/Publish arm64 Image	6m 57s
Run cargo-udeps	1m 52s
Package/Publish 0.0.0-pr776 Helm Chart	48s
Publish/Sign 0.0.0-pr776 Index	40s
Generate Provenance for 0.0.0-pr776 (quay.io) / detect-env	4s
Run OpenShift Preflight Check for 0.0.0-pr776-amd64	34s
Run OpenShift Preflight Check for 0.0.0-pr776-arm64	34s
Generate Provenance for 0.0.0-pr776 (oci.stackable.tech) / detect-env	7s
Generate Provenance for 0.0.0-pr776 (quay.io) / generator	19s
Generate Provenance for 0.0.0-pr776 (oci.stackable.tech) / generator	32s
Generate Provenance for 0.0.0-pr776 (quay.io) / final	3s
Finished Build and Publish	4s
Generate Provenance for 0.0.0-pr776 (oci.stackable.tech) / final	2s
Failure Notification	-1s
	20m 1s

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