Temporarily enable cgo following findings from https://github.com/seaweedfs/seaweedfs/discussions/3152 by https://github.com/dyus
Resolve build issue:
```
# github.com/mattn/go-ieproxy
/go/pkg/mod/github.com/mattn/go-ieproxy@v0.0.3/ieproxy.go:36:9: undefined: getConf
/go/pkg/mod/github.com/mattn/go-ieproxy@v0.0.3/ieproxy.go:41:9: undefined: reloadConf
/go/pkg/mod/github.com/mattn/go-ieproxy@v0.0.3/ieproxy.go:48:2: undefined: overrideEnvWithStaticProxy
/go/pkg/mod/github.com/mattn/go-ieproxy@v0.0.3/ieproxy.go:53:13: psc.findProxyForURL undefined (type *ProxyScriptConf has no field or method findProxyForURL, but does have FindProxyForURL)
```