Update Cilium air-gap images to v1.15.1

Also provides an update for:
- cilium-envoy:v1.27.3-713b673cccf1af661efd75ca20532336517ddcb9
- hubble-ui:v0.13.0

Signed-off-by: Michael Fritch <mfritch@suse.com>

scripts/build-images

@@ -36,15 +36,15 @@ EOF
 if [ "${GOARCH}" != "s390x" ]; then
 xargs -n1 -t docker image pull --quiet << EOF > build/images-cilium.txt
     ${REGISTRY}/rancher/mirrored-cilium-certgen:v0.1.9
-    ${REGISTRY}/rancher/mirrored-cilium-cilium:v1.15.0
-    ${REGISTRY}/rancher/mirrored-cilium-cilium-envoy:v1.27.2-13f6142b9c02268b10d547c8b093ef16724538e3
-    ${REGISTRY}/rancher/mirrored-cilium-clustermesh-apiserver:v1.15.0
-    ${REGISTRY}/rancher/mirrored-cilium-hubble-relay:v1.15.0
-    ${REGISTRY}/rancher/mirrored-cilium-hubble-ui:v0.12.3
-    ${REGISTRY}/rancher/mirrored-cilium-hubble-ui-backend:v0.12.3
-    ${REGISTRY}/rancher/mirrored-cilium-operator-aws:v1.15.0
-    ${REGISTRY}/rancher/mirrored-cilium-operator-azure:v1.15.0
-    ${REGISTRY}/rancher/mirrored-cilium-operator-generic:v1.15.0
+    ${REGISTRY}/rancher/mirrored-cilium-cilium:v1.15.1
+    ${REGISTRY}/rancher/mirrored-cilium-cilium-envoy:v1.27.3-713b673cccf1af661efd75ca20532336517ddcb9
+    ${REGISTRY}/rancher/mirrored-cilium-clustermesh-apiserver:v1.15.1
+    ${REGISTRY}/rancher/mirrored-cilium-hubble-relay:v1.15.1
+    ${REGISTRY}/rancher/mirrored-cilium-hubble-ui:v0.13.0
+    ${REGISTRY}/rancher/mirrored-cilium-hubble-ui-backend:v0.13.0
+    ${REGISTRY}/rancher/mirrored-cilium-operator-aws:v1.15.1
+    ${REGISTRY}/rancher/mirrored-cilium-operator-azure:v1.15.1
+    ${REGISTRY}/rancher/mirrored-cilium-operator-generic:v1.15.1
     ${REGISTRY}/rancher/hardened-cni-plugins:v1.4.0-build20240122
 EOF