Pyroscope explore: strange layering

### What happened? There's a strange layering with the autocompelte dropdown <img width="1783" alt="Image" src="https://github.com/user-attachments/assets/6d49bf10-cac6-46bd-9a89-8e58f694166b" /> ### What did you expect to happen? - ### Did this work before? probably ### How do we reproduce it? 1. switch datasource so Grafana tries to rewrite the query into a pyroscope selector. The rewritten query returns no pyroscope results. 2. Start writing my query. ### Is the bug inside a dashboard panel? _No response_ ### Environment (with versions)? Grafana: Grafana v11.6.0-83417 (c1d9d4d15a) OS: Browser: Chrome Version 133.0.6943.127 (Official Build) (arm64) ### Grafana platform? I don't know ### Datasource(s)? Pyroscope