Bluetooth: controller: ULL: Add handling of chains in disable CTE

Direction finding functionality allows to send a number of periodic
advertising PDUs in a chain that have CTE.
Disable sending CTE requiers additional steps while removing
cte_info from periodic advertising chains.
Removal of cte_info fields may be just delete of that filed
from extended advertising header. In case the PDUs are empty
PDUs created just to transport CTE. Those PDUs should be removed
from a periodic advertising chain.

Signed-off-by: Piotr Pryga <piotr.pryga@nordicsemi.no>