LArRunFormat: Remove dependency on legacy module IOVDbSvc.CondDB
The LArRunFormat utility relied on a variable legacy IOVDbSvc.CondDB python module to distinguish between the run1 database (COMP200) and the Run2/3 database (CONDBR2) thus introducing a dependency on an obsolete package. This MR remove this dependency by defaulting to CONDBR1. Git grep informs me that no client actually relied on the old functionality.