iidx: option to disable recording function (#445)

## Link to GitHub Issue, if one exists
#442 

## Description of change
Adds a new option that intentionally fails the recording functionality.

## Testing
Tested on iidx32.

src/spice2x/launcher/options.h

@@ -238,6 +238,7 @@ namespace launcher {
             spice2x_EnableSMXStage,
             spice2x_EnableSMXDedicab,
             IIDXRecQuality,
+            IIDXRecDisable,
             MidiAlgoVer,
             MidiNoteSustain,
             InputRequiresFocus,