CloudWatch/Logs: Don't group dataframes for non time series queries for non live path (#38915)

* Use the same grouping function in legacy code

* Add error propagation

* Fix tests

* Fix tests

pkg/tsdb/cloudwatch/log_actions_test.go

@@ -81,9 +81,6 @@ func TestQuery_DescribeLogGroups(t *testing.T) {
 								aws.String("group_a"), aws.String("group_b"), aws.String("group_c"),
 							}),
 						},
-						Meta: &data.FrameMeta{
-							PreferredVisualization: "logs",
-						},
 					},
 				},
 			},
@@ -142,9 +139,6 @@ func TestQuery_DescribeLogGroups(t *testing.T) {
 								aws.String("group_a"), aws.String("group_b"), aws.String("group_c"),
 							}),
 						},
-						Meta: &data.FrameMeta{
-							PreferredVisualization: "logs",
-						},
 					},
 				},
 			},
@@ -220,9 +214,6 @@ func TestQuery_GetLogGroupFields(t *testing.T) {
 				aws.Int64(100), aws.Int64(30), aws.Int64(55),
 			}),
 		},
-		Meta: &data.FrameMeta{
-			PreferredVisualization: "logs",
-		},
 	}
 	expFrame.RefID = refID
 	assert.Equal(t, &backend.QueryDataResponse{Responses: backend.Responses{
@@ -357,7 +348,6 @@ func TestQuery_StartQuery(t *testing.T) {
 			Custom: map[string]interface{}{
 				"Region": "default",
 			},
-			PreferredVisualization: "logs",
 		}
 		assert.Equal(t, &backend.QueryDataResponse{Responses: backend.Responses{
 			refID: {
@@ -431,9 +421,6 @@ func TestQuery_StopQuery(t *testing.T) {
 		Fields: []*data.Field{
 			data.NewField("success", nil, []bool{true}),
 		},
-		Meta: &data.FrameMeta{
-			PreferredVisualization: "logs",
-		},
 	}
 	assert.Equal(t, &backend.QueryDataResponse{Responses: backend.Responses{
 		"": {