Small Speedrun Mode Cleanups (#2179)

* Deduplicate Speedrun Overrides

Avoids issues where only one is updated + makes sense organizationally

* Move restore_from_speedrun_mode

I think it makes more sense to have this in the same place the overrides are set

* Camelcase nit

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Co-authored-by: Irastris <irastris15@gmail.com>

include/dusk/speedrun.h

@@ -37,5 +37,6 @@ struct SpeedrunInfo {
 extern SpeedrunInfo m_speedrunInfo;
 
 void resetForSpeedrunMode();
+void restoreFromSpeedrunMode();
 
 }  // namespace dusk