By Elizabeth Piper, Alistair Smout and Andrew MacAskill BIRMINGHAM, England (Reuters) -Prime Minister Liz Truss sought on Wednesday to restore her authority following a chaotic first month in power, urging her Conservative Party to trust her to secure economic growth and steer Britain through “stormy days” ahead. Addressing Conservative lawmakers and members at an annual conference beset by internal bickering and policy confusion, Truss looked to reassure her party, the public and investors that her plan was the right way to transform Britain. “I am ready to make hard choices. You can trust me…