Update `test/libregrtest` to CPython 3.13.10#6410

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fanninpm wants to merge 6 commits intoRustPython:mainfrom

fanninpm:update-libregrtest

Commits on Dec 13, 2025

Update test/libregrtest to CPython 3.13.10

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youknowone
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Re-add try block around platform and encodings info

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Disable WindowsLoadTracker on Windows

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Disable struct._clearcache()

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Disable saved_test_environment context manager

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Disable support.record_original_stdout()

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