Fix dependency tree so that lwip doesn't depend on any specific network
interface component.
Network interface drivers shall depend on esp_netif.
esp_netif shall depend on lwip (but not on any specific interface
driver) -- it optionally depends on vfs and esp_eth (need ethernet
header for L2/bridge mode)
Ethernet driver events properly bounded with ESP NETIF actions to support multiple Ethernet modules used at a time.
Components using Ethernet updated to conform with new API.
Closes https://github.com/espressif/esp-idf/issues/7318