debugger: Remove `Start` button from the attach modal (#34496)

Right now it doesn't work at all (the PID doesn't get set in the
generated scenario), and it's sort of redundant with the picker
functionality.

Release Notes:

- N/A
0ebbeec11cCole Miller committed on 7/15/2025, 9:06:46 PM· committed by GitHubparent0ada4ce
1 file changedLine totals unavailable