[3.9] gh-91916: Fix test_runpy on non-UTF-8 locale (GH-91920) #91944
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If use a non-builtin codec, partially implemented in Python
(e.g. ISO-8859-15), a new RecursionError (with empty error message)
can be raised while handle a RecursionError.
Testing for error message was needed to distinguish
a recursion error from arbitrary RuntimeError. After introducing
RecursionError, it became unnecessary.
(cherry picked from commit a568585)
Co-authored-by: Serhiy Storchaka storchaka@gmail.com