fix(vertex): convert GoogleSearch excludeDomains to camelCase#2299

MukundaKatta wants to merge 3 commits intogoogleapis:maingoogleapis/python-genai:mainfrom

MukundaKatta:codex/python-genai-vertex-exclude-domainsMukundaKatta/python-genai:codex/python-genai-vertex-exclude-domainsCopy head branch name to clipboard