[Bug] Charge MutBorrowFieldGeneric properly

[wlawt]

🐛 Bug

MutBorrowFieldGeneric is currently being charged as MutBorrowField in the interpreter.rs

It's not a backward compatibility issue.

To reproduce

third_part/move/move-vm/runtime/src/interpreter.rs

                    Bytecode::ImmBorrowFieldGeneric(fi_idx)
                    | Bytecode::MutBorrowFieldGeneric(fi_idx) => {
                        let instr = match instruction {
                            Bytecode::MutBorrowField(_) => S::MutBorrowFieldGeneric,
                            _ => S::ImmBorrowFieldGeneric,
                        };
                        println!("{:?}", instr);
                        gas_meter.charge_simple_instr(instr)?;