[Vertex AI] Prepare for 11.4 release#13707

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andrewheard merged 13 commits intomainfrom

vertexai-release

Sep 27, 2024

Commits on Sep 26, 2024

[Vertex AI] Set default request timeout to 180 seconds (#13722)
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Commits on Sep 27, 2024

[Vertex AI] Remove `ImageConversionError` from public API (#13735)
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[Vertex AI] Remove `CountTokensError` enum (#13736)
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Merge remote-tracking branch 'origin/main' into vertexai-release
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