deploy: add CSIDriver for NFS

The API is extended for generation of the NFS CSIDriver object. The
YAML file under deploy/ was created by `yamlgen`.

The contents of the csidriver.yaml file is heavily based on the upstream
CSIDriver from the Kubernetes csi-driver-nfs project.

Because ./tools/yamlgen uses the API, it gets copied under vendor/ .
This causes two copies of the API to be included in the repository, but
that can not be prevented, it seems.

See-also: https://github.com/kubernetes-csi/csi-driver-nfs/blob/master/deploy/csi-nfs-driverinfo.yaml
Signed-off-by: Niels de Vos <ndevos@redhat.com>

api/deploy/kubernetes/nfs/csidriver_test.go

@@ -0,0 +1,38 @@
+/*
+Copyright 2022 The Ceph-CSI 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 nfs
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestNewCSIDriver(t *testing.T) {
+	driver, err := NewCSIDriver(CSIDriverDefaults)
+
+	require.NoError(t, err)
+	require.NotNil(t, driver)
+	require.Equal(t, driver.Name, CSIDriverDefaults.Name)
+}
+
+func TestNewCSIDriverYAML(t *testing.T) {
+	yaml, err := NewCSIDriverYAML(CSIDriverDefaults)
+
+	require.NoError(t, err)
+	require.NotEqual(t, "", yaml)
+}