Remove esp-wifi features where possible

[MabezDev]

trafficstars

If we end up doing #2299 many features of esp-wifi will move away, but many of the remaining ones we should remove and enable by default, like we did for the features in esp-hal. I think these would be:

• async
• embassy-net

On top of trait impls, we probably want to move many of these features to configuration parameters. I think these could be:

• ps-*-modem
• phy-enable-usb