fix: ensure role='assistant' in Azure streaming with include_usage#24326

majiayu000 wants to merge 4 commits intoBerriAI:mainBerriAI/litellm:mainfrom

majiayu000:fix/issue-24221-azure-streaming-role-missingmajiayu000/litellm:fix/issue-24221-azure-streaming-role-missingCopy head branch name to clipboard