[Test] Make test_lazy happy

[MGAMZ]

Error caused by the removal of numpy.compat

Motivation

According to https://numpy.org/devdocs/release/2.0.0-notes.html#deprecations, np.compat has been deprecated, as Python 2 is no longer supported.

This causes several failures in pytest: tests/test_config/test_lazy.py. Fixing this issue now.

Modification

test_lazy.py utilize numpy.compat as an example numpy module to test if the lazy import function can properly working. So simply replacing it with any other existing numpy module, numpy.fft for this PR.

aim dependency

Can't find a valid distribution for aim in python=3.13, so add python version check for this dependency.

Improve _is_builtin_module

In some optimized python version (e.g. conda-forge), the os can be a frozen module. In this case, _is_builtin_module malfunctioned and cause the above test fails. So adding an if-branch to handle this scenario.

[CLAassistant]

All committers have signed the CLA.

[Copilot]

Pull Request Overview

This PR fixes test failures in test_lazy.py caused by NumPy 2.0's removal of the deprecated numpy.compat module, adds Python version restrictions for the aim dependency which lacks Python 3.13 support, and improves the _is_builtin_module function to handle frozen modules in optimized Python distributions.

• Replaces numpy.compat with numpy.fft in lazy import tests
• Restricts aim dependency to Python < 3.13
• Adds frozen module detection to _is_builtin_module

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
tests/test_config/test_lazy.py	Updates test imports and assertions to use numpy.fft instead of deprecated numpy.compat
pyproject.toml	Adds Python version constraint to aim dependency for compatibility
mmengine/config/utils.py	Adds frozen module handling in _is_builtin_module function

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[MGAMZ]

@lauriebax I'm creating this PR, as mentioned in open-mmlab/mmengine. I may create more when I have time.

[MGAMZ]

revert done

[MatthijsBurgh]

We should squash this PR to keep the history clean

[lauriebax]

I've copied your changes to #20 and fixed the pipeline to not break on outside PRs. So I'm closing the PR, thanks for your contribution!