Set DatasourceName and DatasourceType in proxy.Options (#80923)

* Set DatasourceName and DatasourceType in proxy.Options

* upgrade github.com/grafana/grafana-plugin-sdk-go to v0.206.0 and fix merge conflicts

pkg/tsdb/grafana-postgresql-datasource/postgres_snapshot_test.go

@@ -164,7 +164,7 @@ func TestIntegrationPostgresSnapshots(t *testing.T) {
 
 			cnnstr := getCnnStr()
 
-			db, handler, err := newPostgres(cfg, dsInfo, cnnstr, logger)
+			db, handler, err := newPostgres(cfg, dsInfo, cnnstr, logger, backend.DataSourceInstanceSettings{})
 
 			t.Cleanup((func() {
 				_, err := db.Exec("DROP TABLE tbl")