Add overlay and conf for emulated boards allowing the test suite
along with the emulated GNSS driver to be built and tested by CI.
Signed-off-by: Bjarki Arge Andreasen <bjarki@arge-andreasen.me>
Add GNSS API test suite validating the behavior of a GNSS
device adheres to the GNSS API.
Signed-off-by: Bjarki Arge Andreasen <bjarki@arge-andreasen.me>