lca ipc: update the dns validation (#1357)

This change follows the upstream Kubernetes apimachinery update
that now passes the real value to field.Invalid(), resulting in
error messages like Invalid value: "192.168.130.261" instead of
Invalid value: "string".

Signed-off-by: Alexander Chuzhoy <achuzhoy@redhat.com>

Author: achuzhoy

tests/lca/ipchange/tests/ipconfig-test.go

@@ -107,7 +107,7 @@ var _ = Describe(
 					return err
 				}),
 			Entry("Validates input for dnsServers list entry in the IPConfig spec", reportxml.ID("88106"),
-				"spec.dnsServers[0]: Invalid value: \"string\": must be a valid IP address",
+				"spec.dnsServers[0]: Invalid value: \""+string(tsparams.BadIPv4Address)+"\": must be a valid IP address",
 				func(builder *lca.IPConfigBuilder) error {
 					builder.Definition.Spec.DNSServers = []lcaipcv1.IPAddress{tsparams.BadIPv4Address}