YIXIAO SHI

Results 4 issues of YIXIAO SHI

The current request method is hardcoded(default is `GET`), and we hope to configure it through options. https://github.com/VictoriaMetrics/metrics/blob/da211e52b90a182790b140880525c94aa852cb1f/push.go#L370

## Question ```log ➜ tikv git:(master) make clean cargo clean Removed 182 files, 10.5MiB total rm -rf bin dist ➜ tikv git:(master) ➜ tikv git:(master) ➜ tikv git:(master) make rustup...

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