By Michael Shields ZURICH (Reuters) – Swiss authorities have seized a luxurious mountain residence regarded as owned by a Russian oligarch as bankers and officers do the job time beyond regulation to trace belongings of women and men related to Moscow in retribution for the invasion of Ukraine. The Bern canton’s home enterprise mentioned it believed the flat belonged to Petr Aven, recognized by Switzerland as an in depth confidant of President Vladimir Putin and a most important shareholder of the workforce that owns Russia’s largest personal lender, Alfa. The three-bed flat is on the fifth floor of a luxurious complicated at a {golfing} trip resort within the picturesque Bernese…