Use Sigstore staging for test recordings #1577

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Status	Duration	Name
✅ Succeeded	17 seconds	init
✅ Succeeded	25 seconds	clone-repository
✅ Succeeded	48 seconds	sast-snyk-check
✅ Succeeded	2 minutes	prefetch-dependencies
✅ Succeeded	8 minutes	build-container
✅ Succeeded	1 minute	sbom-json-check
✅ Succeeded	1 minute	deprecated-base-image-check
✅ Succeeded	36 seconds	clair-scan
✅ Succeeded	2 minutes	ecosystem-cert-preflight-checks
✅ Succeeded	4 minutes	build-source-image
✅ Succeeded	3 minutes	clamav-scan
✅ Succeeded	2 minutes	show-sbom
✅ Succeeded	1 minute	show-summary