ci: Enable code coverage visualization
What does this merge request do and why?
This allows us to see which lines have been covered by tests inside the merge request. See https://docs.gitlab.com/ee/ci/testing/test_coverage_visualization.html for more details.
Merge request checklist
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Tests added for new functionality. If not, please raise an issue to follow up. -
Documentation added/updated, if needed.
Edited by Stan Hu