Added support for Lambda Lineage to XRay Trace Header using W3CBaggage

[liustve]

Description

Leaving this PR as a draft Lambda has confirmed they are ready for this change across all OTel SDKs. Please review in the meantime.

This change is apart of an ongoing project for all of OpenTelemetry language SDKs to be moved towards support for the Lambda Lineage attribute in the X-Ray trace header via W3C Baggage. See open-telemetry/opentelemetry-java-contrib#1671 for the equivalent Java solution. This PR updates X-Ray propagator to pass lineage into baggage and inject it into outgoing X-Ray trace header.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

XRay propagator will still need to use baggage to store Lineage information but we omit adding any sort of additional baggage data to the xray trace header. Instead Baggage context will remain propagated using W3C Baggage.

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Unit tests were written to verify that the extraction and injection logic were correct. Older unit tests were deprecated and deleted.

Does This PR Require a Core Repo Change?

• No.

Checklist:

See contributing.md for styleguide, changelog guidelines, and more.

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated