introduce `zig cc` cross-compilation setup for GitHub Actions and local development#2535

Draft

jiridanek wants to merge 14 commits intomainfrom

Commits on Sep 23, 2025

see if I can mount /mnt on github actions too
jiridanek
committed
install zig
jiridanek
committed
Add progress display for wget in Zig installation
jiridanek
committed
Configure sandbox to support cross-compilation with Zig for s390x-linux-gnu target.
jiridanek
committed
Fix Dockerfile.cpu mount check logic in `ubi9-python-3.12` runtime
jiridanek
committed
Modify sandbox to set `CC` and `CXX` as environment variables for Zig cross-compilation and unset them afterward.
jiridanek
committed
Simplify Zig paths in sandbox for cross-compilation environment variables `CC` and `CXX`.
jiridanek
committed
Update target in sandbox for s390x to specify glibc version (2.34).
jiridanek
committed
Address deprecation warning and unsupported arg in s390x build process
jiridanek
committed
Add wrapper scripts for Zig cross-compilation and adjust s390x sandbox configuration
jiridanek
committed