Update PyTorch to version 2.8.0

[snnn]

This PR updates PyTorch to version 2.8.0 in all requirements.txt files. I have also updated openai-whisper to the latest version (20250625) to fix installation issues.

This change is for addressing the CVE-2025-32434 .

[snnn]

I have updated the requirements.txt files to fix the installation issues. I also found an issue with the openai-whisper package, which seems to be a problem with the package itself. I have updated the package to the latest stable version and added a note about the issue in the code.

[kunal-vaishnavi]

There was a bug with newer versions of openai-whisper because of the introduction of SDPA.

onnxruntime/onnxruntime/python/tools/transformers/models/whisper/whisper_decoder.py

Lines 112 to 123 in 211d5fa

	# NOTE: There is a bug with openai-whisper==20240930 with the introduction of SDPA.
	# In the Whisper codebase, the following line
	#
	# is_causal = mask is not None and n_ctx > 1
	#
	# has been added where `mask` is a torch tensor. The right-hand side evaluates to `tensor(True/False)`
	# but `is_causal` only accepts the boolean value. The fix is to apply `.item()` after the right-hand
	# side has been evaluated. In other words, the line should be
	#
	# is_causal = (mask is not None and n_ctx > 1).item()
	#
	# instead.

Has this been resolved with the 20250625 release? You can test it out by running the conversion and adding --model_impl openai to your command.