[MAME] Disable Crosshair on Screenshots/Capture

[Spikestuff]

This is similarly related to #2132 but I'm splitting it cause it's MAME and not Mednafen, and there's at least a temporary sort of solution in the other one compared to none here.

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In Light Gun games there shouldn't be any visible crosshair.
In MAME that's 3 settings, visible, visible when moving and never.

Hawk basically in a sense has a hybrid but the hybrid is roughly 4 seconds of the crosshair being visible, then being invisible for the rest (so disabled).

For Publication reasonings, and what happens at the arcades the crosshair should never be visible, cause that's being done on MAME's side.

So this thing shouldn't exist:

What would be good is having both extremes where it's Enabled (good for a showcase perspective) or Disabled (good for a publication perspective) as options instead of whatever related bit of code is causing this.

[vadosnaprimer]

What's the path to it in actual mame options?

[Spikestuff]

I can only find it when a lightgun game is running.

In the case I was using I was using Time Crisis:
[TAB] > Crosshair Options > P1 Visibility

(Obviously there should be cases for more than P1 titles like Point Blank where the settings will be in the same location.)

[YoshiRulz]

<feos> ok crosshair visibility doesn't seem to be exposed to lua engine
<feos> it's stored in cfg which we don't pass