HONG KONG (AP) — Chinese e-commerce retailer Temu has filed a lawsuit in Massachusetts accusing its rival Shein of violating U.S. antitrust law by preventing garment makers from working with it.Temu, which is owned by popular Chinese e-commerce site Pinduoduo Inc., is alleging that Shein has compelled clothing manufacturers to submit to unfair supply chain arrangements preventing them from working with Temu after it entered the U.S. market in 2022.Shein (SHE-in) and Temu (TEE-mu) are fast-rising online shopping platforms. Shein has grabbed the largest share of the fast fashion market in the U.S., at over 50%, according to Temu’s complaint. Temu…