DRA kubelet: use unique protobuf package name

As mentioned in https://protobuf.dev/programming-guides/style, package names
"should be unique". For generated API pb files, Kubernetes uses
"k8s.io.api.<api group>.<version>". The same approach is now used for the
kubelet DRA v1beta1 API. This can be changed without a breaking change because
the API is still unreleased.

This avoids a conflict between the DevicePlugin and the DRA API when both get
used by kubelet:

    2024/11/10 12:51:40 proto: duplicate proto type registered: v1beta1.Device

The exact impact of that conflict is unknown but it seems better to
pro-actively avoid the problem.

Author: pohly

staging/src/k8s.io/kubelet/pkg/apis/dra/v1beta1/api.pb.go

@@ -18,7 +18,7 @@ limitations under the License.
 
 syntax = "proto3";
 
-package v1beta1;
+package k8s.io.kubelet.pkg.apis.dra.v1beta1;
 option go_package = "k8s.io/kubelet/pkg/apis/dra/v1beta1";
 
 import "github.com/gogo/protobuf/gogoproto/gogo.proto";

staging/src/k8s.io/kubelet/pkg/apis/dra/v1beta1/api.proto

@@ -65,8 +65,8 @@ import (
 )
 
 const (
-	NodePrepareResourcesMethod   = "/v1beta1.DRAPlugin/NodePrepareResources"
-	NodeUnprepareResourcesMethod = "/v1beta1.DRAPlugin/NodeUnprepareResources"
+	NodePrepareResourcesMethod   = "/k8s.io.kubelet.pkg.apis.dra.v1beta1.DRAPlugin/NodePrepareResources"
+	NodeUnprepareResourcesMethod = "/k8s.io.kubelet.pkg.apis.dra.v1beta1.DRAPlugin/NodeUnprepareResources"
 )
 
 type Nodes struct {