Ref T270, interpolator optimization by passing aircraft number

Rational: Except for FS9 we interpolate all aircraft in one loop at the same time. This can cause that some steps are always done at the same time for all aircraft of that loop. By passing the number we can more equally distribute such tasks, avoiding peaks.

src/blackmisc/simulation/interpolatormulti.h

@@ -29,7 +29,7 @@ namespace BlackMisc
                                CInterpolationLogger *logger = nullptr);
 
             //! \copydoc CInterpolator::getInterpolation
-            CInterpolationResult getInterpolation(qint64 currentTimeSinceEpoc, const CInterpolationAndRenderingSetupPerCallsign &setup);
+            CInterpolationResult getInterpolation(qint64 currentTimeSinceEpoc, const CInterpolationAndRenderingSetupPerCallsign &setup, int aircraftNumber);
 
             //! \copydoc CInterpolator::getLastInterpolatedSituation
             const Aviation::CAircraftSituation &getLastInterpolatedSituation(CInterpolationAndRenderingSetupBase::InterpolatorMode mode) const;