[Plugins] Add missing/disabled platforms to CI

[janpio]

After improving the CI test configuration regarding platforms, there are still a bunch that had to be removed as the tests are currently failing. I have PRs adding them back, but obviously those can only be merged after the problems have been fixed:

apache/cordova-plugin-camera#469
apache/cordova-plugin-file#328
apache/cordova-plugin-geolocation#160
apache/cordova-plugin-inappbrowser#493
apache/cordova-plugin-media#237
apache/cordova-plugin-wkwebview-engine#104

Each individual problem is linked as an issue in the PR description.