First pass FBX -> Scene File conversion. (#1699)

This is the simple pass, minimizing code changes and focused on comments.

Signed-off-by: stankowi <4838196+AMZN-stankowi@users.noreply.github.com>

Gems/SceneProcessing/Code/Source/SceneBuilder/SceneBuilderWorker.cpp

@@ -50,7 +50,7 @@ namespace SceneBuilder
         if (m_cachedFingerprint.empty())
         {
             // put them in an ORDERED set so that changing the reflection
-            // or the gems loaded does not invalidate FBX files due to order of reflection changing.
+            // or the gems loaded does not invalidate scene files due to order of reflection changing.
             AZStd::set<AZStd::string> fragments;
 
             AZ::SerializeContext* context = nullptr;
@@ -350,7 +350,7 @@ namespace SceneBuilder
     AZ::u32 SceneBuilderWorker::BuildSubId(const AZ::SceneAPI::Events::ExportProduct& product) const
     {
         // Instead of the just the lower 16-bits, use the full 32-bits that are available. There are production examples of
-        // uber-fbx files that contain hundreds of meshes that need to be split into individual mesh objects as an example.
+        // uber-scene files that contain hundreds of meshes that need to be split into individual mesh objects as an example.
         AZ::u32 id = static_cast<AZ::u32>(product.m_id.GetHash());
 
         if (product.m_lod.has_value())