feat: migrate gemini to v2#2349

priyansh4320 wants to merge 28 commits intomainag2ai/ag2:mainfrom

2348-bug-valueerror-additionalproperties-is-not-supported-in-the-gemini-apiag2ai/ag2:2348-bug-valueerror-additionalproperties-is-not-supported-in-the-gemini-apiCopy head branch name to clipboard