Ship Python 3.13t (free-threading) wheels

[hawkinsp]

Python 3.13 has a new no-GIL aka free-threaded mode. Tensorstore does not current ship wheels built with this mode (tag cp313t).

We noticed this because we have added support for free-threading to JAX as of v0.5.1 but can't run a few tests that we have that use tensorstore.

See https://py-free-threading.github.io/ for more information.

[laramiel]

We have not done the work necessary to use tensorstore in a free-threading environment. Getting this started could be useful and appreciated; see our Building and installing page to get started.

Note that we rely on pybind11, so bugs such as this are likely to hinder us: pybind/pybind11#5316

[ziw-liu]

pybind11 3.0.0 added support for free-threading.