Dive bombing is a silly idea for rotorcraft. It just doesn't work aerodynamically.

Sophisticated militaries will strike moving targets with precision guided munitions. Generally either laser guidance with a designator mounted on the drone, or some kind of pattern recognition built into the bomb itself (could be optical, IR, or millimeter wave radar). For example, something like the GBU-44/B.

Poor militaries and insurgents will make do with whatever they can get. Either wait for the target to stop moving, or just lead it a little and hope.