By TAMARA ABRAHAM Mini fashionistas: Suri Cruise, four, carries a $1,295 Dolce & Gabbana bag (left), while Madonna's daughter Mercy keeps her toys in a $235 D&G Miss Lily for Kids satchel (right)No A-list actress worth her overpriced publicist would be seen dead without the latest 'It' bag. So it's little surprise that their children are developing the same habit.While most little girls would