FIX: Don't error out when JSON doesn't end with empty line

[david-cortes-intel]

Description

This PR fixes an issue in which the logic here would assume that JSON outputs from conda list would always have an empty line at the end, which is not necessarily the case depending on versions and shell nuances.

Checklist to comply with before moving PR from draft:

PR completeness and readability

• I have reviewed my changes thoroughly before submitting this pull request.
• Git commit message contains an appropriate signed-off-by string (see CONTRIBUTING.md for details).
• I have added a respective label(s) to PR if I have a permission for that.
• I have resolved any merge conflicts that might occur with the base branch.

Testing

• I have run it locally and tested the changes extensively.
• All CI jobs are green or I have provided justification why they aren't.

[david-cortes-intel]

/intelci: run

[david-cortes-intel]

/intelci: run