chore(all): use netip.Prefix for ip networks

- remove usage of `net.IPNet`
- remove usage of `netaddr.IPPrefix`

internal/routing/conversion.go

@@ -0,0 +1,33 @@
+package routing
+
+import (
+	"fmt"
+	"net"
+	"net/netip"
+)
+
+func NetipPrefixToIPNet(prefix *netip.Prefix) (ipNet *net.IPNet) {
+	if prefix == nil {
+		return nil
+	}
+
+	s := prefix.String()
+	ip, ipNet, err := net.ParseCIDR(s)
+	if err != nil {
+		panic(err)
+	}
+	ipNet.IP = ip
+	return ipNet
+}
+
+func netIPNetToNetipPrefix(ipNet net.IPNet) (prefix netip.Prefix) {
+	return netip.MustParsePrefix(ipNet.String())
+}
+
+func netIPToNetipAddress(ip net.IP) (address netip.Addr) {
+	address, ok := netip.AddrFromSlice(ip)
+	if !ok {
+		panic(fmt.Sprintf("converting %#v to netip.Addr failed", ip))
+	}
+	return address
+}