test: set location in both options and dataset info to fix flakiness

Author: blakeli0

java-bigquery/google-cloud-bigquery/src/test/java/com/google/cloud/bigquery/it/ITBigQueryTest.java

@@ -7819,6 +7819,7 @@ public void testOpenTelemetryTracingDatasets() {
               .setDescription(DESCRIPTION)
               .setMaxTimeTravelHours(72L)
               .setLabels(LABELS)
+              .setLocation("US")
               .build();
 
       Dataset dataset = bigquery.create(info);