docstr: Sends preemption / timeout signal to the job (for testing purpose)
code: def _interrupt(self) -> None:
      """Sends preemption / timeout signal to the job (for testing purpose)"""
      if self._process is not None:
          self._process.send_signal(LocalJobEnvironment._usr_sig())
  
imports: import os
  import shlex
  import signal
  import subprocess
  import sys
  import time
  import typing
  from pathlib import Path
  from ..core import core, job_environment, logger, utils
  from ..core.core import R
label_desc: Use image node_id 6 for calling the LocalJob obj's underlying member method code with example usage: obj._interrupt() without return types