[Platforms] Add Paramedic run to tests

`cordova-paramedic` is the test runner for Cordova Plugins. It creates a project, installs the plugin(s) and their test plugins (and the plugin required to run those tests), then runs the app locally and/or on SauceLabs.

It itself is tested with a dummy plugin when run via the CI of its repository so changes on Paramedic itself can be verified.

Let's add Paramedic to the (CI) tests of the platforms as well. That way we know if a) project creation in the real world still works and b) if the project can be run, and c) depending on if we use the dummy plugin or (all?) core plugins if plugins still function correctly.