In resolving issue 34008, we determined that we *do* support calling Py_Main after Py_Initialize, but it's not clear from that current documentation that this implies a Py_Finalize() call, so you don't need to call that again yourself (and it's actually an error to do so).

So this issue covers updating the draft PR I wrote at https://github.com/python/cpython/pull/8023 to move the Py_Main documentation into the initialization and finalization section, and clarify how it relates to the other initialization and finalization functions.