Llama.cpp tests failing

[anakin87]

Describe the bug
https://github.com/deepset-ai/haystack-core-integrations/actions/runs/10189627850/job/28188014440

Segmentation fault (core dumped)

The bug was introduced in llama-cpp-python==0.2.84

related issues/PRs:
abetlen/llama-cpp-python#1636
abetlen/llama-cpp-python#1637

We can wait for the bug to be fixed or pin the dependency to a working version...

[Amnah199]

Maybe pin the dependency? I need to push a small change for DynamicPromptBuilder in example file and failing tests are blocking my PR.