By Hyunjoo Jin and Akash Sriram (Reuters) -Tesla expects to start production of its next-generation electric vehicle at its Texas factory in the second half of 2025, Chief Executive Elon Musk said on Wednesday, after warning of a sharp slowdown in sales growth this year. But Tesla shares were down 6% in after-hours trading as Musk noted that ramping up production of the new vehicle would be challenging. Musk said it would take “a tremendous amount of new revolutionary manufacturing technology” required – a sign that any boost to Tesla’s declining pace of growth would take time. His projection …