ipsec: Fix routing CIDR iteration on EKS
ipsec: Fix routing CIDR iteration on EKS

When taking a reference of the iterated value in Golang, one needs to
take care to copy the value before taking a reference.

In the case of EKS (where we can have multiple VPC CIDRs, c.f. #15303)
this meant that we only the last routing CIDR was appended to
`IPv4PodSubnets`.

Fixes: a42d442a096a ("cilium: auto-discovery pod subnets for ENI IPAM")

Signed-off-by: Sebastian Wicki <db043b2055cb3a47b2eb0b5aebf4e114a8c24a5a@isovalent.com>

tgraf/cilium,cilium/cilium,cilium/cilium,tklauser/cilium,tklauser/cilium,tklauser/cilium,tgraf/cilium,tgraf/cilium,tklauser/cilium,tklauser/cilium,tgraf/cilium,tgraf/cilium,cilium/cilium,michi-covalent/cilium,tgraf/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium