MGMT-20369: retrieve stream-coreos image instead of rhel-coreos when installing OKD #7534

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Status	Duration	Name
✅ Succeeded	7 seconds	init
✅ Succeeded	32 seconds	clone-repository
✅ Succeeded	2 minutes	prefetch-dependencies
✅ Succeeded	5 minutes	build-images
✅ Succeeded	25 seconds	build-image-index
✅ Succeeded	39 seconds	sast-shell-check
✅ Succeeded	1 minute	clamav-scan
✅ Succeeded	38 seconds	clair-scan
✅ Succeeded	18 seconds	rpms-signature-scan
✅ Succeeded	16 seconds	push-dockerfile
✅ Succeeded	9 seconds	apply-tags
✅ Succeeded	9 seconds	deprecated-base-image-check
✅ Succeeded	1 minute	ecosystem-cert-preflight-checks
✅ Succeeded	51 seconds	build-source-image
✅ Succeeded	6 seconds	coverity-availability-check
✅ Succeeded	1 minute	sast-snyk-check
✅ Succeeded	1 minute	sast-unicode-check
✅ Succeeded	9 seconds	show-sbom