Incompatible typing_extensions

[tamdogood]

System Info

llama stack build --template ollama --image-type conda

### Information

- [ ] The official example scripts
- [ ] My own modified scripts

### 🐛 Describe the bug

`llama-stack` build failed due to couldn't import TypeIs from `typing_extensions`

<img width="949" alt="Image" src="https://github.com/user-attachments/assets/183753f7-090b-4a00-bf37-327a8d1a8696" />

### Error logs

<img width="949" alt="Image" src="https://github.com/user-attachments/assets/3af1856d-403d-437f-8026-ce97abac75c7" />

### Expected behavior

Build works

[tamdogood]