[3.9] bpo-45678: Fix singledispatchmethod classmethod/staticmethod bug - #29394

[3.9] bpo-45678: Fix singledispatchmethod classmethod/staticmethod bug#29394

ambv merged 3 commits into

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AlexWaygood:singledispatchmethod-wrapping-bugAlexWaygood/cpython:singledispatchmethod-wrapping-bugCopy head branch name to clipboard