Regression in nsis-web target for appPackageUrl option

[grovesNL]

• Electron-Builder Version: 25.0.5
• Node Version: n/a
• Electron Version: n/a
• Electron Type (current, beta, nightly): n/a
• Target: nsis-web, Windows x64

Since #6964 the appPackageUrl doesn't work as intended because extra paths are appended to the URL, which means it's not possible to download the latest at a single URL (see #7732 for an example).

My understanding is that APP_PACKAGE_URL_IS_INCOMPLETE intentionally tried to skip setting the package name based on architecture, instead using the name specified with appPackageUrl, but #6964 will use the regular naming.

[mmaietta]

Would you mind sharing a minimum reproducible repo/gist for this issue? I'd like to create a unit test for this

Re: the PR, I'm wondering if it's just safer to revert, but I'd still like to do the unit test to prevent future regressions.