AFRICAN MIRROR REPORTER CARDI B has as many layers as an onion. She does not come off as someone who struggles with self-confidence judging by her large personality, daring fashion looks or her risqué covers, but she told Mariah Carey that it was a big factor in her going under the knife.  The New York rapper sat down with the R&B queen of confidence Carey for her cover story in Interview magazine, speaking about her journey to superstardom, the insecurities that she faced growing up in the Bronx and  “I’m Trini and I’m Dominican, and there’s a lot of Dominicans…