Enable baggage propagator (#1020)

*Description of changes:*
Enabling baggage propagator to support Lineage propagation:
open-telemetry/opentelemetry-java-contrib#1671


By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license.

Author: liustve

awsagentprovider/src/main/java/software/amazon/opentelemetry/javaagent/providers/AwsAgentPropertiesCustomizerProvider.java

@@ -26,7 +26,7 @@ public void customize(AutoConfigurationCustomizer autoConfiguration) {
         () ->
             new HashMap<String, String>() {
               {
-                put("otel.propagators", "xray,tracecontext,b3,b3multi");
+                put("otel.propagators", "baggage,xray,tracecontext,b3,b3multi");
                 put("otel.instrumentation.aws-sdk.experimental-span-attributes", "true");
                 put(
                     "otel.instrumentation.aws-sdk.experimental-record-individual-http-error",

lambda-layer/otel-instrument

@@ -2,7 +2,7 @@
 
 export OTEL_INSTRUMENTATION_AWS_SDK_EXPERIMENTAL_SPAN_ATTRIBUTES=true
 
-export OTEL_PROPAGATORS="${OTEL_PROPAGATORS:-xray,tracecontext,b3,b3multi}"
+export OTEL_PROPAGATORS="${OTEL_PROPAGATORS:-baggage,xray,tracecontext,b3,b3multi}"
 
 export OTEL_SERVICE_NAME=${OTEL_SERVICE_NAME:-${AWS_LAMBDA_FUNCTION_NAME}}