[DO NOT MERGE] feat(vertexai): Add support for setting the API version - wait for the release date#17000

Draft

andrewheard wants to merge 3 commits intofirebase:mainfrom andrewheard:ah/vertex-api-version

+60-6

Commits on Jan 21, 2025

feat(vertexai): Add support for setting the API version
andrewheard
committed

Commits on Jan 22, 2025

Use ApiVersion.v1beta for _defaultApiVersion (instead of string)
andrewheard
committed
Pass requestOptions from API surface into createGenerativeModel
andrewheard
committed