language_models: Fix tool calling for x-ai/grok-code-fast-1 model via OpenRouter
#37094
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Closes #37022
Closes #36994
This update ensures all Grok models use the JsonSchemaSubset format for tool schemas.
A previous fix for this issue was too specific, only targeting grok-4 models. This caused other variants, like grok-code-fast-1, to be missed. We've now broadened the logic to correctly apply the setting to the entire Grok model family.
Release Notes:
x-ai/grok-code-fast-1model via OpenRouter.