style:修复部分 no data 占位高度溢出问题

src/assets/css/components/views/charts2/networkOverviewPerformanceEvent.scss

@@ -28,7 +28,7 @@
     }
     .performance-event-pie {
       position: relative;
-      height: 50%;
+      height: calc(50% - 1px);
       width: 100%;
       .chart-drawing {
         height: 100%;

src/assets/css/components/views/charts2/npmEventsByType.scss

@@ -14,6 +14,9 @@
     border: 1px solid #E2E5EC;
     border-radius: 4px;
     display: flex;
+    .panel-chart__no-data {
+      height: calc(100% - 30px);
+    }
     .npm-event-pies {
       height: 100%;
       width: 100%;