[CP] Add warehouse env var to cortex llm provider

[sfc-gh-chu]

Description

Please include a summary of the changes and the related issue that can be inlcuded in the release announcement. Please also include relevant motivation and context.

Add warehouse env var to cortex llm provider

Other details good to know for developers

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Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update