Fix DescriptorUpdateTemplate usage

Fix DescriptorUpdateTemplate code was not fully complete.
Some of the code needed to be manually generated, and some of the
autogeneration code was not being generated properly.
This includes properly ordering the descriptor information when the
vkUpdateDescriptorSetWithTemplate API entrypoing was called.

Also resolved a few more pNext issues.

Clean up scripts and generate output in local scopes to reduce
stack memory overflow issues.

framework/decode/vulkan_consumer_base.h

@@ -120,11 +120,11 @@ class PointerPairContainer
     {
       public:
         using iterator_category = std::input_iterator_tag;
-        using value_type = PointerPair;
-        using difference_type = PointerPair;
-        using pointer = PointerPair*;
-        using reference = PointerPair&;
-    
+        using value_type        = PointerPair;
+        using difference_type   = PointerPair;
+        using pointer           = PointerPair*;
+        using reference         = PointerPair&;
+
         PointerPairIterator(T1 t1, T2 t2) : t1(t1), t2(t2) {}
 
         PointerPairIterator& operator++()