chore: replace deprecated pynvml with nvidia-ml-py

[ooooo-create]

https://github.com/gpuopenanalytics/pynvml has been marked as deprecated by the official repository, and now relies on nvidia-ml-py. This PR replaces pynvml with nvidia-ml-py.

[paddle-bot]

Thanks for your contribution!

[Copilot]

Pull request overview

This PR updates project and pipeline documentation to reflect the deprecation of the pynvml PyPI package by switching install instructions to nvidia-ml-py, which is the upstream-supported distribution for NVML Python bindings.

Changes:

• Replace pip install ... pynvml with pip install ... nvidia-ml-py across top-level and pipeline READMEs.
• Keep dependency lists consistent across CPU/GPU and CINN/V2 testing guides.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
README.md	Updates the main “third-party libs” install command to use nvidia-ml-py.
engineV2-README.md	Updates engineV2 dependency installation snippet to use nvidia-ml-py.
test_pipline/CINN/README_test_cinn.md	Updates CINN pipeline dependency install command to use nvidia-ml-py.
test_pipline/V2/gpu_bigtensor.md	Updates V2 GPU big tensor guide dependency install command to use nvidia-ml-py.
test_pipline/V2/gpu_accuracy.md	Updates V2 GPU accuracy guide dependency install command to use nvidia-ml-py.
test_pipline/V2/gpu_accuracy_tolerance.md	Updates V2 GPU accuracy tolerance guide dependency install command to use nvidia-ml-py.
test_pipline/V2/gpu_0size.md	Updates V2 GPU 0-size guide dependency install command to use nvidia-ml-py.
test_pipline/V2/cpu_accuracy.md	Updates V2 CPU accuracy guide dependency install command to use nvidia-ml-py.
test_pipline/V2/cpu_0size.md	Updates V2 CPU 0-size guide dependency install command to use nvidia-ml-py.
test_pipline/V2/monitor_script/gpu_0size.md	Updates monitor-script GPU 0-size guide dependency install command to use nvidia-ml-py.
test_pipline/V2/monitor_script/cpu_0size.md	Updates monitor-script CPU 0-size guide dependency install command to use nvidia-ml-py.

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