Backend plugins: Updates due to changes in SDK (#22649)

Use v0.20.0 of SDK

pkg/plugins/backendplugin/client.go

@@ -1,7 +1,6 @@
 package backendplugin
 
 import (
-	"context"
 	"os/exec"
 
 	"github.com/grafana/grafana-plugin-sdk-go/backend/plugin"
@@ -10,7 +9,6 @@ import (
 
 	datasourceV1 "github.com/grafana/grafana-plugin-model/go/datasource"
 	rendererV1 "github.com/grafana/grafana-plugin-model/go/renderer"
-	"github.com/grafana/grafana-plugin-sdk-go/genproto/pluginv2"
 	goplugin "github.com/hashicorp/go-plugin"
 )
 
@@ -77,7 +75,8 @@ func NewBackendPluginDescriptor(pluginID, executablePath string, startFns Plugin
 			},
 			plugin.ProtocolVersion: {
 				"diagnostics": &plugin.DiagnosticsGRPCPlugin{},
-				"backend":     &plugin.CoreGRPCPlugin{},
+				"resource":    &plugin.ResourceGRPCPlugin{},
+				"data":        &plugin.DataGRPCPlugin{},
 				"transform":   &plugin.TransformGRPCPlugin{},
 			},
 		},
@@ -105,12 +104,16 @@ type DiagnosticsPlugin interface {
 	plugin.DiagnosticsServer
 }
 
-type CorePlugin interface {
-	plugin.CoreClient
+type ResourcePlugin interface {
+	plugin.ResourceClient
+}
+
+type DataPlugin interface {
+	plugin.DataClient
 }
 
 type TransformPlugin interface {
-	DataQuery(ctx context.Context, req *pluginv2.DataQueryRequest, callback plugin.TransformCallBack) (*pluginv2.DataQueryResponse, error)
+	plugin.TransformClient
 }
 
 // LegacyClient client for communicating with a plugin using the old plugin protocol.
@@ -121,6 +124,7 @@ type LegacyClient struct {
 
 // Client client for communicating with a plugin using the current plugin protocol.
 type Client struct {
-	CorePlugin      CorePlugin
+	ResourcePlugin  ResourcePlugin
+	DataPlugin      DataPlugin
 	TransformPlugin TransformPlugin
 }