This update for rust1.94 fixes the following issues:

Changes in rust1.94:

- Don't force gcc-15 on SLE-16 and higher (bsc#1261876)

Update to rust1.94.1:

- Release notes can be found externally: https://github.com/rust-lang/rust/releases/tag/1.94.1

- Avoid unwrapping varint decoding during parameters parsing
  (bsc#1259623 CVE-2026-31812).

- Release notes can be found externally: https://github.com/rust-lang/rust/releases/tag/1.94.0