[BUG]: Remove Python 3.11/PyPy dispatch workaround

[Skylion007]

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Problem description

When implementing Python 3.11 support, due to API changes on the frame object we added a hack to get it temporarily working by falling back on an on old PyPy API to prevent the infinite recursion dispatch hack workaround as seen in #3419. As of now, a python code snippit has to be interpreted and evaluated for each dispatch which is far from ideal. Another solution was brought up in #2549, but that would require an API change.

Either we need to find a way to workaround this once the 3.11 private APIs stabilize or to find a better workaround to prevent this recursion issue. I would like to point out that this is the cause of numerous other weird edge cases in function dispatch so cleaning it up would be preferred.

The workaround can be found here:

pybind11/include/pybind11/pybind11.h

Line 2368 in a224d0c

#if !defined(PYPY_VERSION) && PY_VERSION_HEX < 0x030B0000

Reproducible example code

No response