trunk/4338bd1990b3b0247835c836f7b09287938df765: [CD] Drop CPython 3.13t from Linux binary build matrix (#182951)

Summary

pypa/manylinux upstream removed CPython 3.13t (free-threaded) on 2026-05-07 () on the schedule announced months in advance in ): "CPython 3.13t was experimental and has become less relevant now that CPython 3.14t is available and no longer experimental. Free-threading fixes are not always backported in CPython 3.13 given its experimental status."

The current quay.io/pypa/manylinux_2_28_x86_64:latest image no longer ships /opt/python/cp313-cp313t/, so any fresh Docker rebuild that references it fails. Cached image layers on main have been hiding this; the first PR to trigger a fresh rebuild after the upstream push tripped on it.

This PR drops 3.13t from the binary build matrix end-to-end, mirroring upstream. Tracking issue:

Approved by: