Batch crosshair draws on PSP/3DS backend.

[Rinnegatamante]

No description provided.

[MotoLegacy]

Workflow runs approved.

[Rinnegatamante]

I was originally gonna replace FillByColor instead of creating FillByColorBatched and forgot to revert the ingoing changes on that one. Should compile fine now. Friendly reminder that I'm not sure on the PSP change since it technically uses GU_SPRITE which i'm not 100% sure to what corresponds in OGL.

[tanuki-billie]

Tested on O3DS, crosshairs are broken.

Compare with the most recent version (2.0.0-indev+20250811073127):

Sniper scopes render correctly (current on top, PR on bottom):

PSP testing is in progress, will post soon

[tanuki-billie]

PSP testing yields different results (screenshots are of PPSSPP, but identical results on PSP PHAT).

Sniper scope not rendering:

Crosshairs working as expected:

Also check this out:

[Rinnegatamante]

I can drop the PSP portion of the commit or integrate any patch for it. (Don't have a PSP nor pspsdk environment set up to actively test it).