Switch from native_posix to native_sim as default test platform
And switch overlays to native_sim.
For gpio_enable_disable_interrupt, also filter with
platform_allow to save time, as the dt filter requires cmake
to be run, but only the platforms with overlays provided
by the test can be run.
Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
