extension-tool: Always print extension location after its creation
As per comment in the issue
Since commit d1f87ca1 we do print a message when there's no handler to open the newly created file with.
I guess it makes sense to just make that message unconditional.
The extension location was only printed, if there was no handler for
the newly created extension. This is confusing for new extension
developers. So always print the extension location.
Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2515.