fix pyproject.toml confict with requirement.txt and requirements-dev.txt

[wlf-darkmatter]

What this PR does / why we need it?

Fix the conflict between pyproject.toml with requirement.txt and requirements-dev.txt.

related to #2835

Does this PR introduce any user-facing change?

How was this patch tested?

[gemini-code-assist]

Code Review

This pull request aims to synchronize dependency files. The changes correctly move pytest_mock to requirements-dev.txt and update the torch-npu version in the README files. However, there are a couple of outstanding issues. First, requirements-dev.txt contains a duplicate ray dependency (on lines 8 and 14), which should be consolidated. Second, while the READMEs are updated, other documentation files like docs/source/installation.md still reference the old torch-npu version constraint (>= 2.5.1.post1). Addressing these points would make the dependency management more robust and consistent across the project.

[gemini-code-assist]

This trailing blank line, and others in the file, can cause issues during installation. The current parsing logic in setup.py for requirements.txt is brittle and interprets blank lines as empty-string dependencies, which will likely cause pip to fail during installation. Please remove all trailing blank lines from this file. For a more robust long-term fix, consider improving the requirement parsing logic in setup.py to explicitly ignore blank lines.

[tardis-key]

Thank you! LGTM!
#2835

[tardis-key]

@Yikun hi, please review