IBM watsonx.ai code to run Llama models

[yuce-dincer]

What does this PR do?

Added IBM specific code under 3p-integrations.

Feature/Issue validation/testing

Local & Colab test

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you read the contributor guideline,
  Pull Request section?
• Was this discussed/approved via a Github issue? Please add a link
  to it if that's the case.
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

Thanks for contributing 🎉!

[yuce-dincer]

@albertodepaola Would it be possible for you to review this as well? Submitted this sometime ago.