chore(xds): remove back compat for old dns filter (#6226)

This was introduced to support envoy < 1.20 which we no longer need to
support

xref #3499

---------

Signed-off-by: Charly Molter <charly.molter@konghq.com>
Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

api/common/v1alpha1/datasource.go

@@ -2,7 +2,7 @@
 package v1alpha1
 
 import (
-	"github.com/golang/protobuf/ptypes/wrappers"
+	"google.golang.org/protobuf/types/known/wrapperspb"
 
 	system_proto "github.com/kumahq/kuma/api/system/v1alpha1"
 )
@@ -22,7 +22,7 @@ func (ds *DataSource) ConvertToProto() *system_proto.DataSource {
 	case ds.Secret != nil:
 		return &system_proto.DataSource{Type: &system_proto.DataSource_Secret{Secret: *ds.Secret}}
 	case ds.Inline != nil:
-		return &system_proto.DataSource{Type: &system_proto.DataSource_Inline{Inline: &wrappers.BytesValue{Value: *ds.Inline}}}
+		return &system_proto.DataSource{Type: &system_proto.DataSource_Inline{Inline: &wrapperspb.BytesValue{Value: *ds.Inline}}}
 	case ds.InlineString != nil:
 		return &system_proto.DataSource{Type: &system_proto.DataSource_InlineString{InlineString: *ds.InlineString}}
 	}

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/Nordix/simple-ipam v1.0.0
 	github.com/asaskevich/govalidator v0.0.0-20210307081110-f21760c49a8d
 	github.com/cilium/ebpf v0.10.0
-	github.com/cncf/xds/go v0.0.0-20230105202645-06c439db220b
+	github.com/cncf/xds/go v0.0.0-20230105202645-06c439db220b // indirect
 	github.com/containerd/cgroups v1.1.0
 	github.com/containernetworking/cni v1.1.2
 	github.com/containernetworking/plugins v1.2.0