gh-150167: Force eager import of `_bz2` in `bz2.py` to fix supported format detection - #154771

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DavidCEllis wants to merge 7 commits into

python:mainfrom

DavidCEllis:fix-lazy-archive-detection-minimal

Commits on Jul 27, 2026

Add a 'cleared` argument to `import_fresh_module` to allow modules to be removed without
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Document the new `cleared` argument to `import_fresh_module`, add the undocumented
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Add a test for format support under lazy imports
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Document that import_fresh_module has changed.
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Force the eager import of `_bz2` inside `bz2.py`
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Add a link to the issue explaining why `_bz2` is being eagerly imported
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Also clear the internal modules in the success test.
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