debugger_ui: Move `DEBUGGER_PANEL_PREFIX` out of `db` (#28768)

This PR moves the `DEBUGGER_PANEL_PREFIX` constant out of the `db` crate
and into `debugger_ui`, since it is specific to that.

Release Notes:

- N/A
6f0951ff77Marshall Bowers committed on 4/15/2025, 2:59:42 PM· committed by GitHubparent5e09455
2 files changedLine totals unavailable