[FPBuiltinFnSelection] Fold fdiv-by-exact-reciprocal-constant to fmul - #22948

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: aminya/setup-cpp@1f17f92d6a52bfcb1a25348e2c526c2e5cbb1134. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/