Stretch heatmap chart on metrics dashboard full-size

app/assets/javascripts/monitoring/components/charts/heatmap.vue

@@ -63,7 +63,7 @@ export default {
 };
 </script>
 <template>
-  <div v-gl-resize-observer-directive="onResize" class="col-12 col-lg-6">
+  <div v-gl-resize-observer-directive="onResize">
     <gl-heatmap
       ref="heatmapChart"
       v-bind="$attrs"

changelogs/unreleased/214773-metrics-dashboadr-heatmap-styles.yml

+---
+title: Stretch heatmap metrics full column size
+merge_request: 30524
+author:
+type: fixed