By Akash Sriram and Jeffrey Dastin (Reuters) -Dave Clark, the executive who made Amazon.com Inc into a worldwide delivery behemoth, is stepping down as chief executive of the online retailer’s consumer business to pursue other opportunities, the company said on Friday. Amazon CEO Andy Jassy said he expects to name a replacement in the next few weeks and that the company has work ahead “to get to where we ultimately want to be” in the division Clark ran. Clark’s last day will be July 1, after 23 years with the company. The departure further solidifies a changing of the guard at Amazon, which fo…