Support view data source by type

<!-- Please only use this template for submitting feature requests --> **Why is this needed**: It's useful when there contains lots of data sources with different type but similar name. **What would you like to be added**: Add a new filter in the data source page, e.g, usr can select show Prometheus-type data source only, or Loki-type data source only, etc <img width="1947" height="243" alt="Image" src="https://github.com/user-attachments/assets/ff47f024-e6bf-4f6a-847d-4a5ff0c240ed" /> **Who is this feature for?** All users