GH-124483: Mark Py_DECREF, etc. as escaping for the JIT

[markshannon]

Unlike #124615 this doesn't change tier 1 or GC behavior at all.
This ensures correctness of tier 2 without any potential breakage.

We will want to handle Py_DECREF etc. in a more sophisticated way in the future, to improve GC and enable refcounting optimizations. For now though, this fixes the bug in tier2.

• Issue: _Py_Dealloc is an escaping call #124483

[brandtbucher]

@markshannon, I think we also need to handle DECREF_INPUTS (_POP_TOP should be escaping, for example), as well as steal-y stuff:

• _PyTuple_FromStackRefSteal
• _PyList_FromStackRefSteal
• ...am I missing anything else?

An alternative that we discussed is to make the steal-y things only steal on success, and we count on the error handler to pop things otherwise., since it would be a shame if returning a tuple was an "escaping" operation. We could probably also do something similar for _PyEvalFramePushAndInit, if so.