Allow creation of AttributeValue from nostd::span<const char*>

[sirzooro]

Is your feature request related to a problem?
For debugging purposes I would like to add current callstack as an attribute to a span. backtrace_symbols returns char**, so I would like to use it directly and pass to span->SetAttribute(...), wrapped in nostd::span<const char*>. Now this is not possible, AttributeValue cannot be created from nostd::span<const char*>.

Describe the solution you'd like
Allow creation of AttributeValue from nostd::span<const char*>.

Describe alternatives you've considered
Now I need to create extra std::vector<opentelemetry::nostd::string_view> as a workaround.

[lalitb]

This is a valid use case. Though adding any new type in AttributeValue will break the ABI compliance.

[lalitb]

@sirzooro - We discussed in the community meeting, that it would be good to support nostd::span<const char*>. Do you have plans to add the support?

[owent]

Could we also add nostd::span<std::string> if we are planing to break ABI?
We can assign std::vector<std::string> and google::protobuf::RepeatedPtrField<std::string> to nostd::span<std::string> directly .
We must create a container of string_view and keep the same lifetime with the container of std::string now. It's expensive.

[github-actions]

This issue was marked as stale due to lack of activity.