Update to csi-lib-utils@v0.15.0

Manually update to csi-lib-utils@v0.15.0

It was necessary to update to kubernetes-csi/csi-test@v5.1.0 to remove dependency on cloud.google.com/go@v0.34

vendor/github.com/kubernetes-csi/csi-test/v5/driver/mock.go

@@ -0,0 +1,89 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package driver
+
+import (
+	"net"
+
+	"github.com/kubernetes-csi/csi-test/v5/utils"
+	"google.golang.org/grpc"
+)
+
+type MockCSIDriverServers struct {
+	Controller *MockControllerServer
+	Identity   *MockIdentityServer
+	Node       *MockNodeServer
+}
+
+type MockCSIDriver struct {
+	CSIDriver
+	conn *grpc.ClientConn
+}
+
+func NewMockCSIDriver(servers *MockCSIDriverServers) *MockCSIDriver {
+	return &MockCSIDriver{
+		CSIDriver: CSIDriver{
+			servers: &CSIDriverServers{
+				Controller: servers.Controller,
+				Node:       servers.Node,
+				Identity:   servers.Identity,
+			},
+		},
+	}
+}
+
+// StartOnAddress starts a new gRPC server listening on given address.
+func (m *MockCSIDriver) StartOnAddress(network, address string) error {
+	l, err := net.Listen(network, address)
+	if err != nil {
+		return err
+	}
+
+	if err := m.CSIDriver.Start(l); err != nil {
+		l.Close()
+		return err
+	}
+
+	return nil
+}
+
+// Start starts a new gRPC server listening on a random TCP loopback port.
+func (m *MockCSIDriver) Start() error {
+	// Listen on a port assigned by the net package
+	return m.StartOnAddress("tcp", "127.0.0.1:0")
+}
+
+func (m *MockCSIDriver) Nexus() (*grpc.ClientConn, error) {
+	// Start server
+	err := m.Start()
+	if err != nil {
+		return nil, err
+	}
+
+	// Create a client connection
+	m.conn, err = utils.Connect(m.Address(), grpc.WithInsecure())
+	if err != nil {
+		return nil, err
+	}
+
+	return m.conn, nil
+}
+
+func (m *MockCSIDriver) Close() {
+	m.conn.Close()
+	m.server.Stop()
+}