Cloudwatch: Remove core imports from infra/log (#81543)

* Cloudwatch: use logging from plugin-sdk-go instead of infra/log
* Add a link to the TODO issue for moving `instrumentContext`

pkg/tsdb/cloudwatch/metric_data_query_builder.go

@@ -9,11 +9,10 @@ import (
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/cloudwatch"
 
-	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/tsdb/cloudwatch/models"
 )
 
-func (e *cloudWatchExecutor) buildMetricDataQuery(logger log.Logger, query *models.CloudWatchQuery) (*cloudwatch.MetricDataQuery, error) {
+func (e *cloudWatchExecutor) buildMetricDataQuery(query *models.CloudWatchQuery) (*cloudwatch.MetricDataQuery, error) {
 	mdq := &cloudwatch.MetricDataQuery{
 		Id:         aws.String(query.Id),
 		ReturnData: aws.Bool(query.ReturnData),