Pellet Grill Cajun Dry Brined Chicken

Name: Pellet Grill Cajun Dry-Brined Chicken
Ingredients: One 4- to 5-pound chicken, giblets removed; 1 tablespoon smoked paprika; 2 teaspoons granulated garlic; 1 1/2 teaspoons onion powder; 1 1/2 teaspoons sugar; 1 teaspoon dried oregano; 1 teaspoon dried thyme; 3/4 teaspoon cayenne pepper; Kosher salt and freshly ground black pepper; 3/4 cup mayonnaise; 2 tablespoons finely chopped flat-leaf parsley; 2 tablespoons thinly sliced scallions; 2 tablespoons minced cornichons; 2 tablespoons Creole or whole-grain mustard; 2 tablespoons ketchup; 1 tablespoon capers, minced; 1 clove garlic, grated; Several dashes hot sauce; 2 tablespoons unsalted butter, melted; Soft dinner rolls, for serving