If your main CDP is grounded then anything that you attach to the ground bus going out to the circuits is bonding. When you have a green going to your disconnect and motor this is a bonding wire.
You don't have to use a bonding conductor in emt. the emt can act as the bond as long as is complies to 10-804. Most places want the bond in the emt as well. This is good practice just incase something comes apart. You run a bonding conductor in your flex going to your motor as well.
Just look at the definitions of grounding and bonding again.
