By Tom Sims, Jesús Aguado and Valentina Za FRANKFURT/MADRID/MILAN (Reuters) – European banks’ run of soaring profits and record shareholder payouts faces a big test this week when investors assess how fast the boost from higher interest rates is fading, and if a weak economic outlook will make life tougher. Spain’s BBVA reports fourth-quarter numbers on Tuesday, Santander on Wednesday, Deutsche Bank and BNP Paribas on Thursday and UniCredit the following Monday. Other euro zone banks and Switzerland’s UBS follow. The STOXX Europe 600 banks index hit its highest since mid-2018 this month, prope…