refactor(性能测试): 修改性能测试报告内容字段的数据库存储类型

--bug=1032243 --user=宋天阳 【性能测试】报告-错误记录-所有请求-正确请求-点击查看详情没反应-前端报错
https://www.tapd.cn/55049933/s/1429143

performance-test/backend/src/main/resources/db/migration/2.10.8.ddl/V4__2.10.8_release.sql

@@ -0,0 +1,7 @@
+SET SESSION innodb_lock_wait_timeout = 7200;
+--
+-- 增加一个索引
+ALTER TABLE load_test_report_result_realtime
+    MODIFY COLUMN `report_value` longtext NULL;
+
+SET SESSION innodb_lock_wait_timeout = DEFAULT;

performance-test/frontend/src/business/report/components/samples/ErrorSamplesTable.vue

@@ -136,7 +136,10 @@ export default {
       done();
     },
     openRecord(row) {
-      let drawerSamples = this.errorSamples.samples[row.name][row.code];
+      let drawerSamples = [];
+      if (this.errorSamples.samples[row.name]) {
+        drawerSamples = this.errorSamples.samples[row.name][row.code];
+      }
       this.$refs.sampleDrawer.openRecord(drawerSamples);
     },
   },

performance-test/frontend/src/business/report/components/samples/SamplesDrawer.vue

@@ -56,12 +56,16 @@ export default {
     },
     openRecord(samples) {
       this.sampleRecord = [];
+
       this.$nextTick(() => {
+        if (samples) {
           samples.forEach(sample => {
             this.sampleRecord.push(sample);
           });
+        }
         this.drawer = true;
       })
+
     },
   },
 }

performance-test/frontend/src/business/report/components/samples/SamplesTabs.vue

@@ -52,11 +52,13 @@ export default {
                 this.errorSamples.samples[sampleName] = {};
               }
               this.errorSamples.sampleCount[sampleName][code] = this.samples.sampleCount[sampleName][code] || {};
+              if (this.samples.samples[sampleName]) {
                 this.errorSamples.samples[sampleName][code] = this.samples.samples[sampleName][code] || [];
               }
             }
           }
         }
+      }
     },
   },
 };