feat: Twirp Instrumentation

[arielvalentin]

https://github.com/twitchtv/twirp-ruby

• Client instrumentation - Add RPC semantic attributes (possibly share attributes with Faraday and the adapter via HTTPClient.attributes)
• Server instrumentation - Enrich the Rack Span with RPC server semantics and operation name, similar to how it is done with actionpack and sinatra automatic instrumentation

cc: @hmaurer

[github-actions]

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