ci: bump cilium to v1.15.0 #10719

Job	Run time
Build kube-ovn-base	1m 1s
Build kube-ovn-dpdk-base	57s
Build vpc-nat-gateway	26s
Build centos-compile	2m 8s
Build E2E Binaries	1m 49s
Network Policy Path Filter	0s
Build kube-ovn	4m 15s
Kubernetes Conformance E2E	1s
Kube-OVN Conformance E2E	1s
Cilium Chaining E2E	1s
Chart Installation/Uninstallation Test	1s
Installation Compatibility Test	1s
Cyclonus Network Policy E2E	1s
Iptables VPC NAT Gateway E2E	1s
Kubernetes Network Policy E2E	1s
Kube-OVN HA E2E	1s
Kube-OVN IC Conformance E2E	1s
Kube-OVN Submariner Conformance E2E	1s
LB Service E2E	1s
Disable Network Policy Test	1s
Kubevirt VM E2E	1s
Disable OVN LB Test	1s
Underlay Logical Gateway Installation Test	1s
OVN VPC NAT Gateway E2E	1s
Webhook E2E	1s
Push Images	1s
	10m 55s

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