fixed file index bug

- Fixed a bug where the captures file index was not being incremented, resulting in only the final batch of annotations being saved

com.unity.perception/Runtime/GroundTruth/Exporters/Coco/CocoExporter.cs

             };
         }
 
-        public async Task ProcessPendingCaptures(List<SimulationState.PendingCapture> pendingCaptures, SimulationState simState)
+        public async Task ProcessPendingCaptures(List<SimulationState.PendingCapture> pendingCaptures, SimulationState simState, int captureFileIndex)
         {
             var boxJson = string.Empty;
             var keypointJson = string.Empty;

com.unity.perception/Runtime/GroundTruth/Exporters/CocoHybrid/CocoHybridExporter.cs

             m_Perception.OnAnnotationRegistered(annotationId, values);
         }
 
-        public async Task ProcessPendingCaptures(List<SimulationState.PendingCapture> pendingCaptures, SimulationState simState)
+        public async Task ProcessPendingCaptures(List<SimulationState.PendingCapture> pendingCaptures, SimulationState simState, int captureFileIndex)
-            var cocoTask = m_Coco.ProcessPendingCaptures(pendingCaptures, simState);
-            var perceptionTask = m_Perception.ProcessPendingCaptures(pendingCaptures, simState);
+            var cocoTask = m_Coco.ProcessPendingCaptures(pendingCaptures, simState, captureFileIndex);
+            var perceptionTask = m_Perception.ProcessPendingCaptures(pendingCaptures, simState, captureFileIndex);
             await cocoTask;
             await perceptionTask;
         }

com.unity.perception/Runtime/GroundTruth/Exporters/IDatasetExporter.cs

 
         void OnAnnotationRegistered<TSpec>(Guid annotationId, TSpec[] values);
 
-        Task ProcessPendingCaptures(List<SimulationState.PendingCapture> pendingCaptures, SimulationState simState);
+        Task ProcessPendingCaptures(List<SimulationState.PendingCapture> pendingCaptures, SimulationState simState, int captureFileIndex);
 
         Task OnCaptureReported(int frame, int width, int height, string filename);
     }

com.unity.perception/Runtime/GroundTruth/Exporters/PerceptionFormat/PerceptionExporter.cs

     {
         const Formatting k_Formatting = Formatting.Indented;
         string outputDirectory = string.Empty;
-        int captureFileIndex = 0;
 
         public string GetRgbCaptureFilename(params(string, object)[] additionalSensorValues)
         {
             Manager.Instance.ConsumerFileProduced(path);
         }
 
-        public Task ProcessPendingCaptures(List<SimulationState.PendingCapture> pendingCaptures, SimulationState simState)
+        public Task ProcessPendingCaptures(List<SimulationState.PendingCapture> pendingCaptures, SimulationState simState, int captureFileIndex)
         {
             //lazily allocate for fast zero-write frames
             var capturesJArray = new JArray();

com.unity.perception/Runtime/GroundTruth/Exporters/PerceptionNew/PerceptionNewExporter.cs

 
         List<Task> m_PendingTasks = new List<Task>();
 
-        public Task ProcessPendingCaptures(List<SimulationState.PendingCapture> pendingCaptures, SimulationState simState)
+        public Task ProcessPendingCaptures(List<SimulationState.PendingCapture> pendingCaptures, SimulationState simState, int captureFileIndex)
         {
             foreach (var cap in pendingCaptures)
             {

com.unity.perception/Runtime/GroundTruth/SimulationState_Json.cs

 
             void Write(List<PendingCapture> pendingCaptures, SimulationState simulationState, int captureFileIndex)
             {
-                GetActiveReporter()?.ProcessPendingCaptures(pendingCaptures, simulationState);
+                GetActiveReporter()?.ProcessPendingCaptures(pendingCaptures, simulationState, captureFileIndex);
 #if false
                 simulationState.m_SerializeCapturesAsyncSampler.Begin();