[Config] [Tuning] Add DSv4 a8w8 blockscale GEMM configs for gfx942 / cu_num=304 (MI325X) - #4816

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/github-script@v7. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/