By Ron Bousso, Dmitry Zhdannikov, Carolyn Cohn and Saeed Azhar (Reuters) – Energy giant BP, global bank HSBC and the world’s biggest aircraft leasing firm AerCap joined a growing list of companies looking to exit Russia on Monday, as Western sanctions tightened the screws on Moscow over its invasion of Ukraine. The West has moved to punish Russia with a raft of measures, including closing airspace to Russian aircraft, shutting out some Russian banks from the SWIFT global financial network and restricting Moscow’s ability to use its $630 billion foreign reserves. Russia’s economy was already re…