[Internal]: Update LLM Performance matrix with the Elastic Managed LLM

[benironside]

Description

We should update the LLM performance matrix to describe how the Elastic Managed LLM performs on the various tasks in the matrix.

We should also see about updating the other columns.

Resources

We'll need to rely on the security Gen AI team for this info. Specifically @dhru42 and @Charelzard

Which documentation set does this change impact?

Elastic On-Prem and Cloud (all)

Feature differences

What release is this request related to?

N/A

Serverless release

Collaboration model

The product team

Point of contact.

[Charelzard]

I was under the impression this was updated already. @dhru42 can you confirm?

[benironside]

This will be addressed in #3002