Fix Windows artifact naming in desktop packaging

- Fix the naming convention in Electron output to align with previous
  artifact naming to not break external/internal URLs.
- In desktop execution tests, make artifact locator logic stricter to
  test regression.

electron-builder.yml

@@ -4,7 +4,7 @@
 win:
   target: nsis
 nsis:
-  artifactName: ${name}-${version}-Setup.${ext}
+  artifactName: ${name}-Setup-${version}.${ext}
 
 # -----
 # Linux