fix(examples): Timeout waiting for IP addrs in protocol_examples_common (IDFGH-13468)

[serpent213]

For example, in case a unique local address is preferred (via sdkconfig) but not available on the network, this patch prevents initialisation from hanging indefinitely.

Instead, we wait up to 10s for an IPv4 address and another 10s for the preferred type of IPv6 address. In case of timeout, a warning is logged and the program continues.

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