Merge pull request !1 from Ulric Qin/judge_prom_bugfix

2. add slowLogRecordSecond to  log slow query
3. Create a slice with a specified length to avoid dynamic expansion
4. slow query print fetch series time took and the result series num

2. upgrade snappy to v0.0.3 to avoid the following failure on Go 1.16

Bumps [github.com/gin-gonic/gin](https://github.com/gin-gonic/gin) from 1.6.3 to 1.7.0.
- [Release notes](https://github.com/gin-gonic/gin/releases)
- [Changelog](https://github.com/gin-gonic/gin/blob/master/CHANGELOG.md)
- [Commits](https://github.com/gin-gonic/gin/compare/v1.6.3...v1.7.0)

---
updated-dependencies:
- dependency-name: github.com/gin-gonic/gin
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* 1. notify.py 支持安装channel反射发送
2. 支持钉钉群发送
3. 生成告警模板信息

* 1. notify.py 支持安装channel反射发送
2. 支持钉钉群发送
3. 增加二开说明

* 1. notify.py 用户创建一个虚拟的用户保存上述im群 的机器人token信息 user的contacts map中

* 1. notify.py alerts目录改为原来的

* 1. notify.py dingtalk send continue匹配

* 1. push型告警支持多条件 任意一个触发就触发

* 1. prometheus查询接口 tag-keys tag-values支持 params为空的情况

* 1. prometheus查询接口 ident匹配全部改为精确匹配
2. tagKey 提示改为tag_key

* 1. prometheus查询接口 支持instance_query 对外暴露

* 1. prometheus instance_query改名为instant-query
2. page group中去掉数据查询相关path

* 1. prometheus range_query 时间戳改为秒级
2. 查询支持传入分辨率参数

* 1. 新增jmx_exporter内置大盘

* 1. 新增blackbox_exporter内置大盘
2. 新增blackbox_exporter内置告警策略

* 1. 添加一些debug帮助定位恢复的告警在db event中删除的过程

* fix: reuse error var when remoteWritePost

* add debug log

* remove logs