[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/github.com/grafana-tools/sdk/rest-snapshot.go

@@ -0,0 +1,34 @@
+package sdk
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"github.com/pkg/errors"
+)
+
+// https://grafana.com/docs/grafana/latest/http_api/snapshot/
+
+// CreateAnnotation creates a new snapshot.
+func (r *Client) CreateSnapshot(ctx context.Context, a CreateSnapshotRequest) (StatusMessage, error) {
+	var (
+		raw  []byte
+		resp StatusMessage
+		err  error
+		code int
+	)
+	if raw, err = json.Marshal(a); err != nil {
+		return StatusMessage{}, errors.Wrap(err, "marshal request")
+	}
+	if raw, code, err = r.post(ctx, "api/snapshots", nil, raw); err != nil {
+		return StatusMessage{}, errors.Wrap(err, "create snapshot")
+	}
+	if code/100 != 2 {
+		return StatusMessage{}, fmt.Errorf("bad response: %d", code)
+	}
+	if err = json.Unmarshal(raw, &resp); err != nil {
+		return StatusMessage{}, errors.Wrap(err, "unmarshal response message")
+	}
+	return resp, nil
+}