gh-94731: Revert to C-style casts for _Py_CAST

[encukou]

This reverts some changes from #91321

• Issue: _PyObject_CAST breaks code which assumed a static/dynamic casting #94731

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @encukou for commit 498e8bb 🤖

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[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @encukou for commit b13e464 🤖

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[da-woods]

Suggested change

	PyObject *ipotype = PyType_FromSpec(&VirtualPyObject_Spec);
	// no good way to signal failure from a C++ constructor, so use assert
	// for error handling
	assert(ipotype);
	assert(PyObject_Init(this, (PyTypeObject *)ipotype));
	Py_DECREF(ipotype);
	PyObject *vpotype = PyType_FromSpec(&VirtualPyObject_Spec);
	// no good way to signal failure from a C++ constructor, so use assert
	// for error handling
	assert(vpotype);
	assert(PyObject_Init(this, (PyTypeObject *)vpotype));
	Py_DECREF(vpotype);

Just suggesting changing the name slightly here to match the name you used from the class. I think the i from ipotype was a hold-over from the name I used.

[encukou]

Thanks! It's a local variable now so I'll just name it type :)

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @encukou for commit 021c03d 🤖

If you want to schedule another build, you need to add the ":hammer: test-with-buildbots" label again.

[miss-islington]

Thanks @encukou for the PR 🌮🎉.. I'm working now to backport this PR to: 3.11.
🐍🍒⛏🤖

[bedevere-bot]

GH-94849 is a backport of this pull request to the 3.11 branch.