gitPidStatus on Windows doesn't correctly identify suspended processes

[leehinman]

elastic-agent-system-metrics/metric/system/process/process_windows.go

Lines 192 to 211 in e28f1d3

	func getPidStatus(pid int) (PidState, error) {
	handle, err := syscall.OpenProcess(processQueryLimitedInfoAccess, false, uint32(pid))
	if err != nil {
	return Unknown, fmt.Errorf("OpenProcess failed for pid=%v: %w", pid, err)
	}
	defer func() {
	_ = syscall.CloseHandle(handle)
	}()
	var exitCode uint32
	err = syscall.GetExitCodeProcess(handle, &exitCode)
	if err != nil {
	return Unknown, fmt.Errorf("GetExitCodeProcess failed for pid=%v: %w", pid, err)
	}
	if exitCode == 259 { //still active
	return Running, nil
	}
	return Sleeping, nil
	}

The Win32 GetExitCodeProcess Function doesn't directly return if a process is suspended. For Windows, to see if a process is suspended we would have to check all of the process threads and make sure those are suspended. This may require using the non-stable wininternal api.