Ignore the 'CUDA_VISIBLE_DEVICE' setting after importing Monai in the latest Pytorch

[KumoLiu]

FAIL: test_visible_devices (tests.test_set_visible_devices.TestVisibleDevices)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/MONAI/tests/test_set_visible_devices.py", line 37, in test_visible_devices
    self.assertEqual(num_gpus_before, num_gpus_after)
AssertionError: 0 != 2

The root cause could be issues listed here:
https://github.com/pytorch/pytorch/issues/122085