[WIP] Add model: Mistral 7B

[ayewo]

Ticket

This is a draft PR intended to close the original issue: #1049

Problem description

• Add exact model variation to the model test suite
• Enable it to run e2e to get ✅ status in models report
• Profile and report key gaps in performance compared to manually optimized TT-NN model

What's changed

Describe the approach used to solve the problem.
Summarize the changes made and their impact