ACM-16018 Refactor multi-namespace self access checks #4116

Namespace: <a href="https://detailurl.setting.custom-console-url-namespace.is.not.configured" rel="nofollow">crt-redhat-acm-tenant
PipelineRun: <a href="https://console.redhat.com/application-pipeline/ns/crt-redhat-acm-tenant/pipelinerun/console-mce-mce-28-on-pull-request-lqgqh" rel="nofollow">console-mce-mce-28-on-pull-request-lqgqh

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Status	Duration	Name
✅ Succeeded	19 seconds	init
✅ Succeeded	16 seconds	clone-repository
✅ Succeeded	22 seconds	prefetch-dependencies
✅ Succeeded	8 minutes	build-images
✅ Succeeded	26 seconds	build-image-index
✅ Succeeded	18 seconds	rpms-signature-scan
✅ Succeeded	36 seconds	ecosystem-cert-preflight-checks
✅ Succeeded	10 seconds	deprecated-base-image-check
✅ Succeeded	56 seconds	clair-scan
✅ Succeeded	28 seconds	push-dockerfile
✅ Succeeded	28 seconds	apply-tags
✅ Succeeded	2 minutes	clamav-scan
✅ Succeeded	27 seconds	sast-snyk-check
✅ Succeeded	12 seconds	show-sbom