wgsl: AbstractFloat execution tests for fma builtin
wgsl: AbstractFloat execution tests for fma builtin: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). Accuracy is Inherited from x y + z
The task
Accuracy is `Inherited from x * y + z`
Part of FineEnvs/MiMo-V2.6-RL-harbor-code.