Backport: feat(google): update Interactions API implementation to cater for upstream breaking changes coming May 26

[github-actions]

This is an automated backport of #15346 to the release-v6.0 branch. FYI @felixarntz
This backport has conflicts that need to be resolved manually. Conflicts resolved.

git cherry-pick output

Auto-merging content/providers/01-ai-sdk-providers/15-google-generative-ai.mdx
Auto-merging examples/ai-functions/src/stream-text/google/interactions-multimodal-output.ts
Auto-merging packages/google/src/interactions/build-google-interactions-stream-transform.ts
CONFLICT (content): Merge conflict in packages/google/src/interactions/build-google-interactions-stream-transform.ts
Auto-merging packages/google/src/interactions/convert-to-google-interactions-input.test.ts
CONFLICT (content): Merge conflict in packages/google/src/interactions/convert-to-google-interactions-input.test.ts
Auto-merging packages/google/src/interactions/convert-to-google-interactions-input.ts
CONFLICT (content): Merge conflict in packages/google/src/interactions/convert-to-google-interactions-input.ts
Auto-merging packages/google/src/interactions/extract-google-interactions-sources.ts
Auto-merging packages/google/src/interactions/google-interactions-language-model.test.ts
CONFLICT (content): Merge conflict in packages/google/src/interactions/google-interactions-language-model.test.ts
Auto-merging packages/google/src/interactions/google-interactions-language-model.ts
CONFLICT (content): Merge conflict in packages/google/src/interactions/google-interactions-language-model.ts
Auto-merging packages/google/src/interactions/map-google-interactions-finish-reason.ts
Auto-merging packages/google/src/interactions/parse-google-interactions-outputs.test.ts
Auto-merging packages/google/src/interactions/parse-google-interactions-outputs.ts
CONFLICT (content): Merge conflict in packages/google/src/interactions/parse-google-interactions-outputs.ts
Auto-merging packages/google/src/interactions/prepare-google-interactions-tools.test.ts
Auto-merging packages/google/src/interactions/prepare-google-interactions-tools.ts
Auto-merging packages/google/src/interactions/synthesize-google-interactions-agent-stream.ts
error: could not apply 4e825f320... feat(google): update Interactions API implementation to cater for upstream breaking changes coming May 26 (#15346)
hint: After resolving the conflicts, mark them with
hint: "git add/rm <pathspec>", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".
hint: Disable this message with "git config set advice.mergeConflict false"

[github-actions]

🚀 Published in:

Package	Version
ai	6.0.184 github npm
@ai-sdk/angular	2.0.185 github npm
@ai-sdk/google	3.0.75 github npm
@ai-sdk/google-vertex	4.0.130 github npm
@ai-sdk/langchain	2.0.190 github npm
@ai-sdk/llamaindex	2.0.184 github npm
@ai-sdk/react	3.0.186 github npm
@ai-sdk/rsc	2.0.184 github npm
@ai-sdk/svelte	4.0.184 github npm
@ai-sdk/vue	3.0.184 github npm
@ai-sdk/xai	3.0.91 github npm