MGMT-19258: Add the missing [kube-api] label on subsystem tests #6989

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Status	Duration	Name
✅ Succeeded	14 seconds	init
✅ Succeeded	26 seconds	clone-repository
✅ Succeeded	9 minutes	build-container
✅ Succeeded	9 minutes	sast-snyk-check
✅ Succeeded	51 seconds	clair-scan
✅ Succeeded	38 seconds	apply-tags
✅ Succeeded	1 minute	ecosystem-cert-preflight-checks
✅ Succeeded	43 seconds	deprecated-base-image-check
✅ Succeeded	5 minutes	clamav-scan
✅ Succeeded	20 seconds	rpms-signature-scan
✅ Succeeded	1 minute	show-sbom
✅ Succeeded	1 minute	show-summary