MILAN — Circus artists may be daredevils, but that doesn’t stop them from looking glamorous — even when they’re pirouetting on a tightrope or getting a hug from a huge elephant. For spring, a number of Italian designers went for a razzle-dazzle effect fit for the Ringling Bros. with itty-bitty dresses all jazzed up with a carnival of embellishment and loads of color.