Fix serialization and deserialization for ProvideServiceRequest in Gateway

[NemanjaTrifunovicRTRK]

The problem was with the deserialization of the field of type score::mw::com::impl::EventInfo and its std::string_view field name:

struct EventInfo
{
    std::string_view name;
    DataTypeMetaInfo data_type_meta_info;
};

std::string_view is essentially a pointer into a string, so its (de)serialization requires the string's value to be copied, not just the pointer.

Implementation extended:

• score/mw/com/gateway/transport_layer/sample/messages/BUILD
• score/mw/com/gateway/transport_layer/sample/messages/serialization.h

Unit tests extended:

• score/mw/com/gateway/transport_layer/sample/messages/serialization.h

Issue #387

[LittleHuba]

Specializing for this high-level type is probably too coarse.
I would expect that EventInfo falls into https://github.com/NemanjaTrifunovicRTRK/communication/blob/4bad624b0978207811515b9bdf449a7de8bd6622/score/mw/com/gateway/transport_layer/sample/messages/serialization.h#L394

This would mean you only need to provide Deserialize specializations for the internal non-trivially-copyable types.

Same pattern applies for Serialize(). Can you please check whether you can trim the fix into that direction?

[NemanjaTrifunovicRTRK]

Deserialization of score::mw::com::impl::EventInfo fell into https://github.com/NemanjaTrifunovicRTRK/communication/blob/4bad624b0978207811515b9bdf449a7de8bd6622/score/mw/com/gateway/transport_layer/sample/messages/serialization.h#L348.

[LittleHuba]

In that case I think we need to sharpen https://github.com/NemanjaTrifunovicRTRK/communication/blob/4bad624b0978207811515b9bdf449a7de8bd6622/score/mw/com/gateway/transport_layer/sample/messages/serialization.h#L75 to also exclude std::string_views. Once that is done, you should have the expected behavior I outlined above.

[NemanjaTrifunovicRTRK]

Please check score/mw/com/gateway/transport_layer/sample/messages/serialization.h again.
I changed the implementation to not specialize EventInfo type.