Added Llama Bedrock client

[kevinmessiaen]

Description

Added Llama Bedrock client

Related Issue

Type of Change

• 📚 Examples / docs / tutorials / dependencies update
• 🔧 Bug fix (non-breaking change which fixes an issue)
• 🥂 Improvement (non-breaking change which improves an existing feature)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 🔐 Security fix

Checklist

• I've read the CODE_OF_CONDUCT.md document.
• I've read the CONTRIBUTING.md guide.
• I've written tests for all new methods and classes that I created.
• I've written the docstring in Google format for all the methods and classes that I used.
• I've updated the pdm.lock running pdm update-lock (only applicable when pyproject.toml has been
  modified)

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[henchaves]

It's working well!

By the way I found a small error in Claude Client, line 91.

we should replace
sampled_tokens=completion["usage"]["input_tokens"]
with
sampled_tokens=completion["usage"]["output_tokens"]

[henchaves]

Also, it would be better to have a common class called BedrockLLMClient.
It seems that both LLamaBedrockClient and ClaudeBedrockClient are reusing several pieces of code

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