WUZHEN, China, Sept 26 – Chinese technology executives, facing a crackdown by the authorities, pledged support on Sunday for Beijing’s “common prosperity” drive and to help smaller companies. Alibaba Group (9988.HK) CEO Daniel Zhang, a prime target of the broad crackdown, told a conference organised by China’s top internet regulator that his company’s $15 billion plan to boost common prosperity in China was “steadily advancing”.…