Combine Socket and XDP datapaths

[maolson-msft]

Describe the feature you'd like supported

LOLA needs to handle the case where XDP is not available on an interface (to handle e.g. loopback connections). Currently XDP is treated as its own "platform", but really winuser is still the platform. Therefore the platform_raw stuff should be combined with platform_winuser.

Proposed solution

See description.

Additional context

No response