[backport] ci: Update Cilium image usage for release/v1.5#3098

jpayne3506 merged 2 commits intorelease/v1.5Azure/azure-container-networking:release/v1.5from

jpayne3506/bp-3089-v1.5Azure/azure-container-networking:jpayne3506/bp-3089-v1.5Copy head branch name to clipboard