[v3.2] Add grafana dashboard importing API (#11)

* Add API to import grafana templates to kubesphere dashboard
* Merge and fix the latest codes from kubesphere #2501

Signed-off-by: zhu733756 <talonzhu@yunify.com>

vendor/kubesphere.io/client-go/restclient/restclient.go

@@ -0,0 +1,44 @@
+/*
+Copyright 2021 The KubeSphere 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 restclient
+
+import (
+	rest "k8s.io/client-go/rest"
+	iamv1alpha2 "kubesphere.io/client-go/restclient/versioned/iam/v1alpha2"
+)
+
+// NewForConfig returns a new Client using the provided config and Options.
+func NewForConfig(c *rest.Config) (*RestClient, error) {
+	var rc RestClient
+	var err error
+	rc.iamV1alpha2, err = iamv1alpha2.NewForConfig(c)
+	if err != nil {
+		return nil, err
+	}
+	return &rc, nil
+}
+
+// RestClient is a set of restful API clients that doesn't compatible with
+// Kube API machinery.
+type RestClient struct {
+	iamV1alpha2 *iamv1alpha2.IamV1alpha2Client
+}
+
+// IamV1alpha2 retrieves the IamV1alpha2Client
+func (c *RestClient) IamV1alpha2() iamv1alpha2.IamV1alpha2Interface {
+	return c.iamV1alpha2
+}