The Windows GitLab CI job has been updated to provision and use the
GNU Rust toolchain for MinGW builds, fixing job failures caused by
incomplete Rust setup and missing linker support.
* js/gitlab-ci-windows-rust:
ci(gitlab,windows): provide GNU Rust's host-linker support
ci(gitlab,windows): fix Rust setup for GitLab's MinGW build
ci(gitlab,windows): preserve exclusions during dependency setup
ci(gitlab,windows): provision GNU Rust for SDK-based MinGW builds