Instrumentation.AWSLambda-1.1.0-beta.2

This is the first release with the new package name OpenTelemetry.Instrumentation.AWSLambda.

• BREAKING (API, behavior): Rename package to OpenTelemetry.Instrumentation.AWSLambda
  (remove .Contrib) (#593).
  This also affects the ActivitySource name (superseding #534).
• Pre-release version numbering scheme changed from .betaN to beta.N (#639)
• BREAKING (API): Move public class AWSLambdaWrapper out of Implementation subnamespace
  (#593)
• BREAKING (API): Rename overloads of AWSLambdaWrapper.Trace that take an async
  handler to TraceAsync, to emphasize that they (usually) need to be awaited.
  (#608)
• Rewrite of parent context handling and related changes
  (#408):
  • BREAKING (API): Remove AWSLambdaWrapper.Trace/TraceAsync overloads
    without ILambdaContext parameter.
  • BREAKING (behavior): Add automatic parent extraction from HTTP triggers
    (API Gateway Proxy events), using the configured global textmap propagator.
  • BREAKING (behavior): An activity is now also created if no parent context
    could be extracted (previously this package would only create activities if
    a valid parent span context could be extracted with X-Ray).
  • Add optional parent context (ActivityContext) to AWSLambdaWrapper.Trace/TraceAsync.
  • Add AWSLambdaInstrumentationOptions.DisableAwsXRayContextExtraction
    initialization option.
• Add version to ActivitySource (#593)