Add parameter to enable tracing

[Mi3-14159]

Hi,

thats an awesome project thank you 👍

It would be super nice to be able to enable the xray tracing feature.
Currently we can follow the trace through our whole step function until the request to those lambdas.

what can be enhanced:

• enable tracing in lambdas
• wrap clients with xray where makes sense
• allow to set the tracing id in ProcessCallbackFunction from input

The last point is useful if you want to follow the traces even after the step function receives the callback.