fix: populate required for Pydantic BaseModel parameters in FunctionTool#4778

gautamvarmadatla wants to merge 5 commits intogoogle:maingoogle/adk-python:mainfrom

gautamvarmadatla:fix/pydantic-basemodel-required-fieldsgautamvarmadatla/adk-python:fix/pydantic-basemodel-required-fieldsCopy head branch name to clipboard