Finally! After an unforgettable week in which America — already reeling from the brutal caught-on-video Minneapolis police killing of George Floyd, on top of a pandemic, a recession and … everything — watched with dropped jaw literally dozens of videos of police clubbing, shoving or driving into peaceful protesters, or tear-gassing them and even maiming some for life with rubber bullets, some officers are finally standing up and declaring: “I quit.”The problem is, the 57 members of the police riot response unit in Buffalo, N.Y., who “resigned” — to be clear, these cops aren’t giving up their j…