AWS SDK: Add an option to add tracing information to request headers instead of message attributes

[gillesbergerp]

This concerns the AWS SDK instrumentation

Right now, the instrumentation injects the tracing information in SNS/SQS message attributes. If you want to make use of SNS active tracing in X-Ray, tracing information is only passed along if it is in the request header.

We could introduce a configuration option for giving the user control whether it should be injected in the message attributes or as request header.

[github-actions]

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