Fix: Status 'unknown' for coverage badges

Currently, we do not have any output on the coverage badges. This is because of a removed project setting within CI/CD (see here).

Description

This MR fixes the missing coverage output within our test pipeline.

Related Issue

Motivation and Context

If we have coverage badges within our README they should work!

How Has This Been Tested?

The coverage is showing again within the pipelines as can be seen here.

I've also added the badge for this branch, which should show that it is working as intended:

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.