Use Data#to_h and Struct#to_h for JSON encoding

`Hash[Array#zip]` was used before Struct supported #to_h.

Data#to_h and Struct#to_h are also faster according to benchmarks:
https://github.com/rails/rails/pull/47273/files#r1097994236

activesupport/lib/active_support/core_ext/object/json.rb

@@ -68,14 +68,14 @@ def as_json(options = nil) # :nodoc:
 if RUBY_VERSION >= "3.2"
   class Data # :nodoc:
     def as_json(options = nil)
-      Hash[members.zip(deconstruct)].as_json(options)
+      to_h.as_json(options)
     end
   end
 end
 
 class Struct # :nodoc:
   def as_json(options = nil)
-    Hash[members.zip(values)].as_json(options)
+    to_h.as_json(options)
   end
 end