wifi: eswifi: use NET_SOCKETS_OFFLOAD_PRIORITY
wifi: eswifi: use NET_SOCKETS_OFFLOAD_PRIORITY

Use NET_SOCKETS_OFFLOAD_PRIORITY instead of
NET_SOCKETS_OFFLOAD_PRIORITY, so that by default offloaded sockets will
be used instead of native sockets.

Addiitonally this allows to select relative priority of offloaded TLS
versus native TLS when used together with NET_SOCKETS_TLS_PRIORITY.

Signed-off-by: Marcin Niestroj <63506c06cfbc47ace147db1702f6e751f5ac2132@emb.dev>

finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr