[Feature]: Change Anthropic `Client` in favor of our `litellm`'s fork in both `chat` and `prompt_step`

[HamadaSalhab]

🔖 Feature description

Now that we have forked litellm and fixed the issue of sending images as part of tool results, we can get back to using litellm for Anthropic models instead of relying on Anthropic client.

🎤 Why is this feature needed ?

No response

✌️ How do you aim to achieve this?

No response

👀 Have you searched issues and PRs to see if this feature request has been raised before?

• [X] I checked and didn't find similar issue