Show unit test code coverage in pipeline

[jcoenen96]

[Brend-Smits]

"I've discussed with @Yuqera that we are going for a slightly different approach:

Only execute the action on code push to develop or master Create a webpage that shows the results in a user-friendly manner instead of giving them assets (better to show stakeholders as well) For reference, you can check how we do it in lighthouse checks on the frontend" This was commented in the PR. When this has been implemented, open a new PR