refactor(性能测试): 压力配置时ramp过大时图表不予展示

--bug=1009613 --user=刘瑞斌 性能测试压力配置页面上用户时间设置很大时，浏览器直接奔溃 https://www.tapd.cn/55049933/s/1103329

frontend/src/business/components/performance/test/components/PerformancePressureConfig.vue

@@ -649,6 +649,7 @@ export default {
           smooth: false,
           symbolSize: 5,
           showSymbol: false,
+          sampling: 'lttb',
           itemStyle: {
             color: hexToRgb(color[i % color.length]),
             borderColor: 'rgba(137,189,2,0.27)',
@@ -656,6 +657,10 @@ export default {
           },
         };
 
+        if (tg.rampUpTime > 10000) {
+          this.$warning(this.$t('load_test.ramp_up_tips'));
+          return;
+        }
 
         let timePeriod = Math.floor(tg.rampUpTime / tg.step);
         let timeInc = timePeriod;

frontend/src/i18n/en-US.js

@@ -994,6 +994,7 @@ export default {
     ramp_up_time_within: 'In',
     ramp_up_time_minutes: 'seconds, separate',
     ramp_up_time_seconds: 'seconds add VUs',
+    ramp_up_tips: 'The RampUp is too large, the chart rendering will not be displayed, this does not affect the test execution, please refer to the actual results',
     iterate_num: 'Iterations',
     by_iteration: 'By iterations',
     by_duration: 'By duration',

frontend/src/i18n/zh-CN.js

@@ -998,6 +998,7 @@ export default {
     ramp_up_time_within: '在',
     ramp_up_time_minutes: '秒内，分',
     ramp_up_time_seconds: '秒内增加并发用户',
+    ramp_up_tips: 'RampUp 过大，图表渲染卡顿不予展示，这并不影响测试执行，请以实际结果为准',
     iterate_num: '迭代次数',
     by_iteration: '按迭代次数',
     by_duration: '按持续时间',

frontend/src/i18n/zh-TW.js

@@ -998,6 +998,7 @@ export default {
     ramp_up_time_within: '在',
     ramp_up_time_minutes: '秒內，分',
     ramp_up_time_seconds: '秒內增加並發用戶',
+    ramp_up_tips: 'RampUp 過大，圖表渲染卡頓不予展示，這並不影響測試執行，請以實際結果為準',
     iterate_num: '叠代次數',
     by_iteration: '按叠代次數',
     by_duration: '按持續時間',