RHCLOUD-35836 - Kessel E2E testing setup + Increase test coverage #258

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PipelineRun: <a href="https://console.redhat.com/application-pipeline/ns/project-kessel-tenant/pipelinerun/inventory-api-on-pull-request-lxff6" rel="nofollow">inventory-api-on-pull-request-lxff6

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Status	Duration	Name
✅ Succeeded	6 seconds	init
✅ Succeeded	17 seconds	clone-repository
✅ Succeeded	2 minutes	build-container
✅ Succeeded	12 seconds	rpms-signature-scan
✅ Succeeded	6 seconds	build-image-index
✅ Succeeded	13 seconds	deprecated-base-image-check
✅ Succeeded	18 seconds	sast-snyk-check
✅ Succeeded	16 seconds	ecosystem-cert-preflight-checks
✅ Succeeded	41 seconds	clair-scan
✅ Succeeded	49 seconds	clamav-scan
✅ Succeeded	7 seconds	apply-tags
✅ Succeeded	21 seconds	push-dockerfile
✅ Succeeded	13 seconds	show-sbom
✅ Succeeded	12 seconds	show-summary