build: update gt4py (numpy 2 compatibility and ipcx support)

[romanc]

Description

This PR updates the gt4py submodule. In particular, we get

• numpy 2.x compatible code from the debug backend
• support for icpx, Intel's parallel compiler

Complete transition to numpy 2.x will come in #389 (and PRs that will be linked from there).

/cc @FlorianDeconinck, @twicki FYI

How has this been tested?

All good as long as CI is still green.

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas: N/A
• I have made corresponding changes to the documentation (e.g. add new modules to docs/docstrings/): N/A
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules
• New check tests, if applicable, are included: N/A

[FlorianDeconinck]

Oui.