[rustdoc] Ensure that temporary doctest folder is correctly removed even if doctests failed#140706

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GuillaumeGomez wants to merge 2 commits intorust-lang:masterfrom

GuillaumeGomez:fix-missing-temp-dir-cleanup

Commits on May 6, 2025

Add new `test_main_with_exit_callback` public function in `libtest` to allow a callback to be called before exiting
GuillaumeGomez
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Ensure that temporary doctest folder is correctly removed even if doctests failed
GuillaumeGomez
committed