Add NPU setup checks to driver library Python API

The Python API tests and InferenceRunner for driver library only
supports the Subsystem NPU configuration, so checks have been added to
verify that the correct configuration is used.

Change-Id: I85a99549ae2588c598f9dde69b7a35b554c9b2a1
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>