By RICARDO CASTILLO     Mexico’s state-owned energy companies Petróleos Mexicanos (Pemex) and the Federal Electricity Commission (CFE) continue to be leading problems for the administration of President Andrés Manuel López Obrador (AMLO). Both are separate entities that must be dealt with separately. So we’ll start with a look at Pemex, and then consider th CFE a few paragraphs down. Pemex and