treewide: Move ranges usings to common header.

Author: xlauko

include/vast/Util/Common.hpp

@@ -104,4 +104,7 @@ namespace vast {
     using maybe_builder_callback_ref = std::optional< builder_callback_ref >;
     using builder_callback           = std::function< void(mlir_builder &, loc_t) >;
 
+    using value_range = mlir::ValueRange;
+    using type_range = mlir::TypeRange;
+
 } // namespace vast

lib/vast/Conversion/Parser/ToParser.cpp

@@ -232,9 +232,6 @@ namespace vast::conv {
             ).getResult(0);
         }
 
-        using value_range = mlir::ValueRange;
-        using type_range = mlir::TypeRange;
-
         std::vector< mlir_value > convert_value_types(
             value_range values, type_range types, auto &rewriter
         ) {