Process information not reported for FreeBSD ARM64

[sdalu]

Describe the bug
Missing (nil) processes information reported on FreeBSD ARM64 system (RPI4)

To Reproduce

package main

import (
	"fmt"
	"os"

	"github.com/shirou/gopsutil/process"
)

func main() {
	currentPid := os.Getpid()
	myself, err := process.NewProcess(int32(currentPid))
	if err != nil {
		panic(err)
	}
	fmt.Println(myself.Name())
	fmt.Println(myself.String())
	fmt.Println(myself.NumThreads())
	fmt.Println(myself.RlimitUsage(true))
	fmt.Println(myself.Status())
}

Obtained results

 <nil>
{"pid":96242}
0 <nil>
[] not implemented yet
 <nil>

Expected behavior
non nil information

Environment (please complete the following information):

• FreeBSD: [paste the result of freebsd-version -k -r -u and uname -a]
  13.2-RELEASE-p2
  13.2-RELEASE-p2
  13.2-RELEASE-p2
  FreeBSD brain.home.sdalu.com 13.2-RELEASE-p2 FreeBSD 13.2-RELEASE-p2 releng/13.2-n254627-4341433a673f GENERIC arm64

Additional context
Initially reported in influxdata/telegraf#13933

[danawoodman]

We're also facing this issue on a Pi 4 device, is there a know workaround available?

[shirou]

@sdalu @danawoodman I have opened #1609 which re-generate struct definition. Could you try it?