[3.12] gh-126876: Fix socket internal_select() for large timeout (GH-126968) (#127003)

gh-126876: Fix socket internal_select() for large timeout (GH-126968)

If the timeout is larger than INT_MAX, replace it with INT_MAX, in
the poll() code path.

Add an unit test.
(cherry picked from commit b3687ad454c4ac54c8599a10f3ace8a13ca48915)

Co-authored-by: Victor Stinner <vstinner@python.org>