Add JaCoCo Gradle Plugin to all modules

[alvasw]

Supersedes #6689

[alvasw]

Hi @napoly,

Sorry! I didn't want to steal your work or hurt your feelings!

I checked the Gradle documentation when I reviewed your PR, and I was confused that you upgraded Gradle and the shadow library. We usually only update dependencies if we have to (for security reasons) to avoid supply chain attacks. I had to try it myself to see whether the library updates were needed.

I will close my PRs (#6717, #6718, #6719, #6720) [#6720 needs some changes]. Please cherry-pick the commits and re-commit them (to set yourself as the author). This is the first time, I heard about GitHubs co-author feature.

[alejandrogarcia83]

utACK