Replace stdlib net.Interface* with vishvananda/netlink to avoid blocked forever goroutines #15051
Description
Netlink is not reliable protocol, and recv without a timeout might block infinitely. See #14710 and #14746 (comment) for more ctx.
The Go's stdlib net.Interface*() function family when built for Linux (https://github.com/golang/go/blob/master/src/net/interface_linux.go) is using netlink socket w/o timeout to retrieve ifaces. Currently, we have the following net.Interface*() users in the code:
cilium@master > gg -l net.Interface
pkg/mcastmanager/mcastmanager_test.go
pkg/mtu/detect_linux.go
pkg/multicast/multicast.go
pkg/multicast/multicast_test.go
vendor/github.com/google/gopacket/layers/sflow.go
vendor/github.com/google/uuid/node_net.go
vendor/github.com/shirou/gopsutil/net/net.go
vendor/github.com/shirou/gopsutil/net/net_windows.go
vendor/github.com/vishvananda/netns/README.md
vendor/golang.org/x/net/icmp/helper_posix.go
vendor/golang.org/x/net/icmp/interface.go
vendor/golang.org/x/net/internal/socket/sys_posix.go
vendor/golang.org/x/net/ipv4/dgramopt.go
vendor/golang.org/x/net/ipv4/doc.go
vendor/golang.org/x/net/ipv4/sockopt_posix.go
vendor/golang.org/x/net/ipv4/sockopt_stub.go
vendor/golang.org/x/net/ipv4/sys_asmreq.go
vendor/golang.org/x/net/ipv4/sys_asmreq_stub.go
vendor/golang.org/x/net/ipv4/sys_asmreqn.go
vendor/golang.org/x/net/ipv4/sys_asmreqn_stub.go
vendor/golang.org/x/net/ipv4/sys_ssmreq.go
vendor/golang.org/x/net/ipv4/sys_ssmreq_stub.go
vendor/golang.org/x/net/ipv6/dgramopt.go
vendor/golang.org/x/net/ipv6/doc.go
vendor/golang.org/x/net/ipv6/sockopt_posix.go
vendor/golang.org/x/net/ipv6/sockopt_stub.go
vendor/golang.org/x/net/ipv6/sys_asmreq.go
vendor/golang.org/x/net/ipv6/sys_asmreq_stub.go
vendor/golang.org/x/net/ipv6/sys_ssmreq.go
vendor/golang.org/x/net/ipv6/sys_ssmreq_stub.go
vendor/k8s.io/apimachinery/pkg/util/net/interface.go
Once #14710 has been resolved, switch to vishvananda/netlink to avoid the blocks.