feat: Replace nginx ingress with Traefik in validation and image conf #5528

Job	Run time
Create snap package	17m 18s
Test core addons	27m 10s
Cluster agent health check	54s
Upgrade path test	16m 53s
Test community addons	33m 43s
Test core addons upgrade	14m 4s
Security scan	29s
Test airgap installation	7m 31s
upload_sarifs_matrix (traefik.sarif)	17s
upload_sarifs_matrix (cni.sarif)	12s
upload_sarifs_matrix (metrics-server.sarif)	12s
upload_sarifs_matrix (hostpath-provisioner.sarif)	12s
upload_sarifs_matrix (snap.sarif)	13s
upload_sarifs_matrix (trivy-microk8s-repo-scan--results.sarif)	12s
upload_sarifs_matrix (coredns.sarif)	15s
upload_sarifs_matrix (kube-controllers.sarif)	13s
upload_sarifs_matrix (node.sarif)	13s
upload_sarifs_matrix (pause.sarif)	15s
upload_sarifs_matrix (busybox.sarif)	12s
	2h 0m 28s

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