If the Congress’ adjournment motion against the Mulayam Singh Yadav government shows how the two allies have drifted apart, political circles are abuzz over how close Mulayam has travelled towards PM Atal Behari Vajpayee.They point to the manner in which controversial UP Chief Secretary Akhand Pratap Singh got a three-month extension in spite of opposition from the bureaucracy after Mulayam is believed to have put in a ‘‘personal word’’ for his continuation with the PM. ‘Plot to embarrass govt’