Mikel Arteta confirmed that Ben White would be sidelined for “many, many weeks,” ruling him out for the rest of Arsenal’s season and very possibly the World Cup as well. White limped off in the first half of Sunday’s tense victory over West Ham United with what has been diagnosed as a “significant medial knee ligament injury.” “It looks like a long-term injury,” Arteta revealed to assembled media on Thursday, “so at the moment the focus is when we can have him back to be available for Arsenal, and that’s not going to happen for many, many weeks.” The enforced removal of White against West Ham had a destructive ripple effect throughout the entire Arsenal team. Arteta first shunted Declan Rice into that position without much success before turning to Cristhian Mosquera at the interval. In the end, the Gunners had to rely upon a hotly controversial VAR decision to escape from the London Stadium with all three points.…