Restore higher-scoped teardown when a flaky condition is falsy

[teddytennant]

pytest_runtest_teardown decides whether to suspend module, class and session finalizers using a gate that checks the rerun limit, the failure statuses and terminal errors. It never checks the flaky marker's condition, which _should_not_rerun does check.

So with a falsy condition on a failing test, teardown suspends the higher-scoped finalizers, the protocol then declines to rerun, _restore_suspended_finalizers is never reached, and that fixture's teardown never runs again for the rest of the session:

@pytest.fixture(scope="module", autouse=True)
def module_fixture():
    yield
    print("module teardown")

@pytest.mark.flaky(reruns=2, condition=False)
def test_fail():
    assert False

module teardown is not printed. With condition=True, or with no marker at all, it is. The damage is not local either, since suspended_finalizers is a module-level global: run that file alongside another and the first module's fixture stays un-torn-down past the end of its own module.

Adding the missing term to the gate is the whole fix. I also updated the comment above it, which enumerated the terms and was already one short.

Tests cover class, module and session scope, a string condition that evaluates falsy, and the cross-module case. Two are guards rather than reproductions: condition=True still reruns and still tears down exactly once, and a plain --reruns failure with no marker is unaffected.

Scope, so you do not have to ask. This fixes the condition gap only. Two related leaks are pre-existing and untouched. A terminal error raised in the teardown phase still leaks, because _terminal_errors["teardown"] is written from pytest_runtest_makereport after the teardown hook has already suspended, so it needs a hookwrapper rather than another gate term. And a call-phase failure consisting solely of failed subtests tears higher-scoped fixtures down prematurely on every attempt, which is the same drift in the opposite direction. Happy to take either as a follow-up if you want them.