fix(接口定义): 批量导出成功提示自动关闭

--bug=1047147 --user=白奇 【接口测试】接口定义-批量选中导出，导出成功提示信息不会自动关闭 https://www.tapd.cn/55049933/s/1585792

frontend/src/views/api-test/management/components/management/api/apiTable.vue

@@ -1120,7 +1120,7 @@
             ),
           ]),
         ]),
-      duration: 999999999, // 一直展示，除非手动关闭
+      duration: 10000, // 10s 自动关闭
       closable: true,
     });
   }

frontend/src/views/case-management/caseManagementFeature/components/caseTable.vue

@@ -1207,7 +1207,7 @@
             ),
           ]),
         ]),
-      duration: 999999999, // 一直展示，除非手动关闭
+      duration: 10000, // 10s 自动关闭
       closable: true,
     });
   }