fix(vertex_ai): raise error on mid-stream 429/error chunks instead of silently swallowing - #23711

fix(vertex_ai): raise error on mid-stream 429/error chunks instead of silently swallowing#23711

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BerriAI:shin_agent_oss_staging_05_13_2026BerriAI/litellm:shin_agent_oss_staging_05_13_2026from

qiniu:fix/vertex-gemini-streaming-429-errorqiniu/litellm:fix/vertex-gemini-streaming-429-errorCopy head branch name to clipboard