Specialization never occurs with custom eval frame evaluator

[DinoV]

Bug report

Bug description:

An eval frame evaluator doesn't necessarily want to disable specialization of Python -> Python calls... The custom eval frame can either hook the specializing functions its self or they can specify vectorcall on a function object which prevents the nested dispatch. There should be an option for the eval frame replacement to say they still want specialization to occur.

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

• gh-146031: Allow keeping specialization enabled when specifying eval frame function #146032