By Adam Bloodworth Plaza Suite review and star rating: Sarah Jessica Parker and Matthew Broderick are commanding in joint West End debut ★★★★ Last night, Uptown: New York’s most iconic real life couple, live on the London stage. Too many things are called iconic when they aren’t, but in the case of Plaza Suite it’s a fair description. Parker is making her West End debut in this campy Neil Simon comedy play and it’s a joyous night at the theatre. Mostly because it turns out watching two Hollywood actors who are married IRL lark about live is darn good fun. Who knew? (Well, most of us actually, …