DeepSpeed

1062a0c6 - Unpin accelerate tests, update lightning with node16 removal. (#6611)

Unpin accelerate tests, update lightning with node16 removal. (#6611) HF accelerate fixes implemented in https://github.com/huggingface/accelerate/pull/3145 mean that we no longer need to pin the Accelerate version! nv-lightning tests now run on Ubuntu 20.04+, so we support >node 16, so we can remove the explicit permissions for that in the env config.