tests: Fix variable reference in mul_to_multimul_checker#2709

aobolensk wants to merge 8 commits into

Lightning-AI:mainLightning-AI/lightning-thunder:mainfrom

aobolensk:fix-cpu-tensor-mul_to_multimul_checkeraobolensk/lightning-thunder:fix-cpu-tensor-mul_to_multimul_checkerCopy head branch name to clipboard