[New Feature] Add a value to override the `EMPulseSparkles` animation played over units.

[CCHyper]

Description:

When a unit is hit with an EM Pulse weapon, the animation defined at EMPulseSparkles= in [AudioVisual] is played over the unit while it is disabled. Adding an override to this would allow greater flexibility to the EM Pulse mechanic.

Possible Implementation:

Add EMPulseSparkles=<AnimType to WarheadTypes.