drivers: wifi: AIROC: update connect\scan api

- Updated airoc_mgmt_connect to be able use security provided
  by user (params->security). If it is not passed, we will perform
  scan ssid to detect secure type.

- Fix convert_whd_security_to_zephyr() with correct corresponding
  whd_security_t to zephyr security type.

Signed-off-by: Nazar Palamar <nazar.palamar@infineon.com>