tests: bsim: bluetooth: host: privacy: peripheral: test after reboot

Extended the scope of the BabbleSim test for the Bluetooth test under
the host/privacy/peripheral category. The tests ensures correct RPA
advertising after the system a reboot when the Bluetooth identities
are preloaded from the Settings subsystem.

Signed-off-by: Kamil Piszczek <Kamil.Piszczek@nordicsemi.no>