Add a Kconfig option that allows user to set any necessary config
using management interface before interface be operational. A use
case is set the EUI-64 address from an external EEPROM by the
NET_REQUEST_IEEE802154_SET_EXT_ADDR command. After all configs
are done net_if_up() can be invoked to bring interface up.
Fixes#23193.
Signed-off-by: Gerson Fernando Budke <nandojve@gmail.com>
