chore(netlink): debug log ip rule commands in netlink instead of routing package

internal/netlink/helpers_test.go

@@ -0,0 +1,8 @@
+package netlink
+
+import "net/netip"
+
+func makeNetipPrefix(n byte) netip.Prefix {
+	const bits = 24
+	return netip.PrefixFrom(netip.AddrFrom4([4]byte{n, n, n, 0}), bits)
+}