fix: migrate failing because options passed to clean are null

[jcassidyav]

PR Checklist

• [X] The PR title follows our guidelines: c.
• [ ] There is an issue for the bug/feature this PR is for. To avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it.
• [X] You have signed the CLA.
• [ ] All existing tests are passing: https://github.com/NativeScript/nativescript-cli/blob/master/CONTRIBUTING.md#contribute-to-the-code-base
• [ ] Tests for the changes are included.

What is the current behavior?

ns migrate fails with TypeError: Cannot read properties of undefined (reading 'silent') at ProjectCleanupService.<anonymous> (/Users/jcassidy/.nvm/versions/node/v18.13.0/lib/node_modules/nativescript/lib/services/project-cleanup-service.js:25:35)

What is the new behavior?

Added null checks.

migrate works.