LLM: Install CPU version torch with extras [all]

[xiangyuT]

Description

Set torch version in all_requirements to install cpu version torch instead of cuda version on CPU.

[Oscilloscope98]

Could the torch==2.0.1+cpu be successfully installed without --index-url https://download.pytorch.org/whl/cpu? If not, we may also update the UT, documentation, examples, etc.

Besides, is there any difference between Windows and Linux?

[Oscilloscope98]

Seems like the UT failed after this change: https://github.com/intel-analytics/ipex-llm/actions/runs/8809956275/job/24181761869?pr=10868

[xiangyuT]

Could the torch==2.0.1+cpu be successfully installed without --index-url https://download.pytorch.org/whl/cpu? If not, we may also update the UT, documentation, examples, etc.

Besides, is there any difference between Windows and Linux?

No, it needs to add --extra-index-url https://download.pytorch.org/whl/cpu during installation. And the UT's failure seems the same reason: the install action is missing --extra-index-url setting. (refer to here)

The installation on Windows is not tested yet.

[qiyuangong]

Can we add -extra-index-url into setup.py or requirements.txt?

Just like https://github.com/OpenAccess-AI-Collective/axolotl/blob/main/requirements.txt#L1