gh-106529: Fix subtle Tier 2 edge case with list iterator#106756
Merged
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The Tier 2 opcode _IS_ITER_EXHAUSTED_LIST (and _TUPLE)
didn't set
it->it_seqto NULL, causing a subtle bugthat resulted in test_exhausted_iterator in list_tests.py
to fail when running all tests with -Xuops.
The bug was introduced in gh-106696.
Added this as an explicit test.
Also fixed the dependencies for ceval.o -- it depends on executor_cases.c.h.