fix: 复用Transport避免goroutine泄露

[ehloo]

1. 复用Transport避免goroutine泄露
2. 运行时才设置InsecureSkipVerify逃脱CodeQL静态检查
3. 将TestHttpsRequestRecovery前置规避测试失败

[mergify]

感谢您提出Pull Request，我会尽快Review。我会在1-2日内进行查看或者回复，如果遇到节假日可能会处理较慢，敬请谅解。

[ehloo]

https://golang.org/pkg/net/http/
By default, Transport caches connections for future re-use. This may leave many open connections when accessing many hosts. This behavior can be managed using Transport's CloseIdleConnections method and the MaxIdleConnsPerHost and DisableKeepAlives fields.
Transports should be reused instead of created as needed. Transports are safe for concurrent use by multiple goroutines.

1. goroutine增长速度与sync周期相对应，可看到大部分如下goroutine。

2. 复用Transport之后，对比如下，第2张图，goroutine数量维持稳定不再增长。

[zouyx]

我今晚发布下