ns clean doesnt respect package manager

[offizium-berndstorath]

Issue Description

If I set pnpm as the ns package manager and run ns clean it tries to remove package-lock.json which obviously doesnt exist

Reproduction

1. Use any ns project
2. set pnpm as package manager
3. run ns clean

Relevant log output (if applicable)

No response

Environment

echo 'y' | npx nativescript-envinfo Doesnt show pnpm version. So this makes no sense

Please accept these terms

• I have searched the existing issues as well as StackOverflow and this has not been posted before
• This is a bug report
• I agree to follow this project's Code of Conduct

[rigor789]

We will remove package-lock.json from ns clean by default in a future release. Users will still be able to configure additionalPathsToClean and add it back, or a different package-manager's lockfile.

Right now this is known/expected behavior, and the file is skipped if not found.