Process: Raise exception on timeout.

[squirrelsc]

Currently, timeouts in PowerShell tools are not handled properly. An exception is raised with an empty error message. So, the underlying process should always raise exeptions to get errors obvious. To compatible with some rare condition, make it configurable.

[squirrelsc]

@vyadavmsft Please check this fix, it should raise exception on timeout. It can solve the problem of #4066.

[LiliDeng]

While testing your PR, I came across an existing bug that was already present in the code.

2025-10-28 06:01:17.033[1796][DEBUG] lisa.local.cmd[2852] cmd: ['cmd', '/c', 'hostname'], cwd: None, shell: True, sudo: False, nohup: False, posix: False, remote: False, encoding: utf-8
2025-10-28 06:01:17.038[7952][ERROR] lisa.env[generated_6] case failed
Traceback (most recent call last):
  File "C:\app\lsg-lisa\lisa\lisa\runners\lisa_runner.py", line 297, in _deploy_environment_task
    self.platform.deploy_environment(environment)
  File "C:\app\lsg-lisa\lisa\lisa\platform_.py", line 188, in deploy_environment
    raise identifier
  File "C:\app\lsg-lisa\lisa\lisa\platform_.py", line 185, in deploy_environment
    self._deploy_environment(environment, log)
  File "C:\app\lsg-lisa\lisa\lisa\sut_orchestrator\azure\platform_.py", line 662, in _deploy_environment
    raise e
  File "C:\app\lsg-lisa\lisa\lisa\sut_orchestrator\azure\platform_.py", line 633, in _deploy_environment
    location, deployment_parameters = self._create_deployment_parameters(
                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\app\lsg-lisa\lisa\lisa\sut_orchestrator\azure\platform_.py", line 1231, in _create_deployment_parameters
    arm_parameters.vm_tags["lisa_username"] = local().tools[Whoami].get_username()
                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\app\lsg-lisa\lisa\lisa\tools\whoami.py", line 21, in get_username
    return self.run("", shell=True).stdout.strip()
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\app\lsg-lisa\lisa\lisa\executable.py", line 329, in run
    return process.wait_result(
           ^^^^^^^^^^^^^^^^^^^^
  File "C:\app\lsg-lisa\lisa\lisa\util\process.py", line 384, in wait_result
    assert self._process
           ^^^^^^^^^^^^^
AssertionError
2025-10-28 06:01:17.038[7952][INFO] lisa.runner[0] 'generated_6' attached to test case 'AzureImageStandard.verify_ifcfg_eth0(lisa_0_6)':