Replace queue fanout with party-0 coordinator - #2285

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: r7kamura/rust-problem-matchers@9fe7ca9f6550e5d6358e179d451cc25ea6b54f98. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/