[mlir][ods] Assert on static getAttrName methods

[Mogball]

Summary

This patch makes ODS insert an assert when calling static get*AttrName
methods with a OperationName that the name is the same as the op's.
This prevents accidentally passing the wrong kind of name and getting an
erroneous attribute name.

mlir/tools/mlir-tblgen/OpDefinitionsGen.cpp

// Emit the getAttributeNameForIndex methods.
     auto *method = opClass.addStaticInlineMethod<Method::Private>(
         "::mlir::StringAttr", "getAttributeNameForIndex",
         MethodParameter("::mlir::OperationName", "name"),
         MethodParameter("unsigned", "index"));
     ERROR_IF_PRUNED(method, "getAttributeNameForIndex", op);
 
     const char *const getAttrName = R"(
   assert(index < {0} && "invalid attribute index");
+  assert(name.getStringRef() == getOperationName() && "invalid operation name");
   return name.getRegisteredInfo()->getAttributeNames()[index];
 )";
     method->body() << formatv(getAttrName, attributes.size());
   }
 
   // Generate the <attr>AttrName methods, that expose the attribute names to
   // users.
   const char *attrNameMethodBody = "  return getAttributeNameForIndex({0});";