listTimeSeries: increase timeout from 30 seconds to 60 seconds

src/poller/poller-core/index.js

@@ -232,16 +232,20 @@
     view: 'FULL',
   };
 
-  return metricsClient.listTimeSeries(request).then((metricResponses) => {
+  const options = {
+    timeout: 60 // seconds
+  };
+
+  return metricsClient.listTimeSeries(request, options).then((metricResponses) => {
     const resources = metricResponses[0];
     let maxValue = 0.0;
     let maxLocation = 'global';
 
     for (const resource of resources) {
       for (const point of assertDefined(resource.points)) {
         const value = assertDefined(point.value?.doubleValue) * 100;
         if (value > maxValue) {
           maxValue = value;
           if (resource.resource?.labels?.location) {
             maxLocation = resource.resource.labels.location;
           }