Fix 0 byte handling in Upload Stream

MERGE REQUEST

MR Guidelines

Overview

We weren't fulling testing 0 byte handling in our upload streaming. Extended testing and added fix.

Example for Visual Changes

Failing pipeline https://gitlab.com/SkynetLabs/skyd/-/jobs/1363790531#L194

Checklist

Review and complete the checklist to ensure that the MR is complete before assigned to an approver.

• All new methods or updated methods have clear docstrings
• Testing added or updated for new methods
• Any new packages are added to Makefile and .gitlab-ci.yml
• API documentation updated for API updates
• Module README.md updated for changes to workflow
• Changelog File Created

Issues Closed