German Chancellor Olaf Scholz and Ukrainian President Volodymyr Zelensky will deliver the most high-profile speeches at this year’s Davos forum on Wednesday, as pressure mounts on Berlin to send combat tanks to Kiev. Zelensky is readying for a second year of war against the invading Russian forces. Ukraine has made major battlefield gains, but heavy battle tanks are considered vital to recapturing Russian-occupied territories. So far, however, Ukraine has received only Soviet-made tanks that were in the inventory of Eastern European NATO countries. Berlin has so far refused to send the sophist…