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gh-160473: Improve performance of exception raise - #160476
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By the end of _PyErr_SetObject() the value is a normalized exception instance, so handing it to _PyErr_Restore() only created a reference to its type that was dropped again, and fetched the traceback of the value to set it back on the same object. Call _PyErr_SetRaisedException() directly instead. On the free-threaded build this also removes two atomic operations on the shared refcount of a heap exception type for every raise from a thread that does not own the type object. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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