Add 'with torch.no_grad()' to BEiT integration test forward passes (#14961)
Add 'with torch.no_grad()' to BEiT integration test forward passes (#14961)

* Add 'with torch.no_grad()' to BEiT integration test forward pass

* Fix inconsistent use of tabs and spaces in indentation
huggingface/transformers,huggingface/transformers,huggingface/transformers,huggingface/transformers