std: net: uefi: Add support to query connection data
- Use EFI_TCP4_GET_MODE_DATA to be able to query for ttl, nodelay, peer_addr and socket_addr.
- peer_addr is needed for implementation of `accept`.
- cc `````@nicholasbishop`````
- Also a heads up. The UEFI spec seems to be wrong or something for [EFI_TCP4_CONFIG_DATA](https://uefi.org/specs/UEFI/2.11/28_Network_Protocols_TCP_IP_and_Configuration.html#efi-tcp4-protocol-getmodedata). `ControlOption` should be a pointer as seen in [edk2](
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