Cloud GUIDS: Instrument AWS SDK's Seahorse

[fallwith]

With a primary focus on generating cloud guids (an arn in the case of AWS) and a secondary focus on providing metrics segments for AWS SDK client calls, we should instrument the Seahorse::Client::Base class provided by aws-sdk-core (limiting support to v3+).

As of the latest (February 2024) release, the "install everything, please" aws-sdk-resources gem declares 378 dependencies on other aws-sdk-* gems. Given that the client classes in these other gems all inherit from Seahorse, it makes sense to go after Seahorse first and fill in any gaps in coverage later.

[workato-integration]

https://new-relic.atlassian.net/browse/NR-247224

[tannalynn]

After looking into it, instrumenting seahorse wouldn't give us the information we need, so we will have to instrument each gems clients individually.