GH-118095: Allow a variant of RESUME_CHECK in tier 2

[markshannon]

Currently executors cannot start with RESUME or RESUME_CHECK.

This PR adds two special tier 2 uops that allow the eval_breaker to be check efficiently and to guarantee progress if the executor would start with RESUME or RESUME_CHECK.

• Issue: Increase the number of micro-ops that we can handle in tier 2 #118095

[gvanrossum]

Impressive!

[markshannon]

Unfortunately it seems that my assumption that _Py_HandlePending clears the flags is false, so this doesn't work.
I think the general idea of moving the expensive operation off out line is sound, but the details need working out.

It appears that _Py_HandlePending may leave the eval breaker set to non-zero, but that it will eventually clear it if called repeatedly.