NAD(P)H Quinone Dehydrogenase 1 Ablation Inhibits Activation of the Phosphoinositide 3‐Kinase/Akt Serine/Threonine Kinase and Mitogen‐Activated Protein Kinase/Extracellular Signal‐Regulated Kinase Pathways and Blocks Metabolic Adaptation in Hepatocellular Carcinoma