Fix migration issue with ReflectionProbe box size

com.unity.render-pipelines.high-definition/HDRP/Lighting/Reflection/HDAdditionalReflectionData.cs

 
         void MigrateToUseInfluenceVolume()
         {
+            influenceVolume.boxSize = legacyProbe.size;
-            influenceVolume.shape = influenceShape;
+            influenceVolume.shape = influenceShape; //must be done after each size transfert
             influenceVolume.boxBlendDistancePositive = blendDistancePositive;
             influenceVolume.boxBlendDistanceNegative = blendDistanceNegative;
             influenceVolume.boxBlendNormalDistancePositive = blendNormalDistancePositive;

com.unity.render-pipelines.high-definition/HDRP/Lighting/Reflection/HDProbe.cs

             get { return m_RefreshMode; }
             set { m_RefreshMode = value; }
         }
-        
+
-                influenceVolume = new InfluenceVolume(this);
-            else
-                influenceVolume.Init(this);
+                influenceVolume = new InfluenceVolume();
+            influenceVolume.Init(this);
         }
 
         void ISerializationCallbackReceiver.OnBeforeSerialize()

com.unity.render-pipelines.high-definition/HDRP/Lighting/Reflection/Volumes/InfluenceVolume.cs

         /// Value between 0 (on InfluenceVolume hull) and sphereRadius (fade sub volume reduced to a point).
         /// </summary>
         public float sphereBlendNormalDistance { get { return m_SphereBlendNormalDistance; } set { m_SphereBlendNormalDistance = value; } }
-
-        internal InfluenceVolume(HDProbe probe)
-        {
-            Init(probe);
-        }
-
+        
         internal void Init(HDProbe probe)
         {
             this.probe = probe;