feat: Add llama-3.3 models for Groq

[pvoo]

Summary

Added support for two new Groq LLM models: Llama 3.3 70B Specdec and Llama 3.3 70B Versatile. These models are part of Groq's latest offerings and provide enhanced capabilities compared to previous versions.

Screenshots

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Checklist

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods