[feature branch] Fix setup script generation errors

[sfc-gh-bdufour]

NB: this intended for NADE collaboration on a feature branch and will not be checked in to main

Pre-review checklist

• [X] I've confirmed that instructions included in README.md are still correct after my changes in the codebase.
• [N/A] I've added or updated automated unit tests to verify correctness of my new code.
• [N/A] I've added or updated integration tests to verify correctness of my new code.
• [X] I've confirmed that my changes are working by executing CLI's commands manually.
• [X] I've confirmed that my changes are up-to-date with the target branch.
• [N/A] I've described my changes in the release notes.
• [X] I've described my changes in the section below.

Changes description

Fixed misc errors in the script generation logic to enable manual end-to-end testing via the snow app bundle command.