Alibaba Group Holding Ltd. reported a 6.6% rise in revenue after its main e-commerce and cloud businesses managed only modest growth.Revenue for the three months ended March rose to 221.9 billion yuan ($30.7 billion), compared with analysts’ estimates for 219.8 billion yuan. Net income dived a worse-than-expected 86% after accounting for losses from publicly traded holdings. Its shares slid about 5% in pre-market trading....