[mlir] NamedSequence builder honor arg_attrs when building

Previously the builder did not attach argument attributes when calling NamedSequenceOp::build with `arg_attrs`, which makes we can not create a legal named_sequence operation by this builder.

This patch ensures `arg_attrs` are stored in the op state
so verification and printing show them.

Author: colawithsauce

mlir/lib/Dialect/Transform/IR/TransformOps.cpp

@@ -2571,6 +2571,11 @@ void transform::NamedSequenceOp::build(OpBuilder &builder,
                      TypeAttr::get(FunctionType::get(builder.getContext(),
                                                      rootType, resultTypes)));
   state.attributes.append(attrs.begin(), attrs.end());
+  if (!argAttrs.empty()) {
+    SmallVector<Attribute> argAttrsVec(argAttrs.begin(), argAttrs.end());
+    state.getOrAddProperties<Properties>().arg_attrs =
+        ArrayAttr::get(builder.getContext(), argAttrsVec);
+  }
   state.addRegion();
 
   buildSequenceBody(builder, state, rootType,