Unpin once transformers latest is fixed

[loadams]

Reverts #7085 which pinned the transformers version due to likely breaking changes from huggingface/transformers#36335

Error:

RuntimeError: Failed to import transformers.models.vision_encoder_decoder.modeling_vision_encoder_decoder because of the following error (look up to see its traceback)

FAILED unit/runtime/zero/test_zero_nesting_init.py::TestNestedParallelInit::test_nested_parallel_init - RuntimeError: Error(s) in loading state_dict for VisionEncoderDecoderModel:

Testing fixes in huggingface/transformers#36455

[loadams]

nv-a6000 test appears to be failing because transformers calls from torch.distributed.tensor import DTensor which doesn't exist prior to torch 2.5. This can be resolved by updating the docker image running on the test node to 24.12.