This is taken care of by the individual cache items and
if none exist, tar fails.

If tests end in an unknown state it is sometimes required that IWD
be stopped manually in order for future tests to run. Add a stop()
method so test tearDown() methods can explicitly stop IWD.

This tests ensures IWD disconnects after receiving an association
timeout event. This exposes a current bug where IWD does not
transition to disconnected after an association timeout when
FT-roaming.

The default() method was added for convenience but was extending the
test times significantly when the hostapd config was lengthy. This
was because it called set_value for every value regardless if it
had changed. Instead store the current configuration and in default()
only reset values that differ.

In preparation to remove ft_associate build the FTE/RSNE in
ft_prepare_handshake and set into the handshake object directly.

This will be called from station after FT-authentication has
finished. It sets up the handshake object to perform reassociation.

This is essentially a copy-paste of ft_associate without sending
the actual frame.

Essentially exposes (and renames) netdev_ft_tx_associate in order to
be called similarly to netdev_reassociate/netdev_connect where a
connect callback can be provided. This will fix the current bug where
if association times out during FT IWD will hang and never transition
to disconnected.

This also removes the calling of the FT_ROAMED event and instead just
calls the connect callback (since its now set). This unifies the
callback path for reassociation and FT roaming.

Using this will provide netdev with a connect callback and unify the
roaming result notification between FT and reassociation. Both paths
will now end up in station_reassociate_cb.

Fixes: 30c6a10 ("netdev: Separate connect_failed and disconnected paths")

The reassociation is done through netdev directly, these are no
longer needed.

The notification for roaming success/failure is now handled with
the connect callback.