[Bug][ci] Deploy docs is busted

[areusch]

See for example https://ci.tlcpack.ai/blue/organizations/jenkins/tvm/detail/main/4756/pipeline

Traceback (most recent call last):
  File "./ci/scripts/jenkins/s3.py", line 134, in <module>
    chmod(files)
  File "./ci/scripts/jenkins/s3.py", line 70, in chmod
    SH.run(f"chmod +x {' '.join(to_chmod)}")
  File "/tmp/jenkins-ba6c252c/workspace/exec_0/tvm/deploy-docs/ci/scripts/jenkins/cmd_utils.py", line 78, in run
    return subprocess.run(cmd, **defaults)
  File "/usr/lib/python3.8/subprocess.py", line 493, in run
    with Popen(*popenargs, **kwargs) as process:
  File "/usr/lib/python3.8/subprocess.py", line 858, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/usr/lib/python3.8/subprocess.py", line 1704, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
OSError: [Errno 7] Argument list too long: '/bin/sh'

cc @Mousius @driazati @gigiblender