fix(aws-sdk): use `custom` client_context prop#2718

pichlermarc merged 2 commits intoopen-telemetry:mainopen-telemetry/opentelemetry-js-contrib:mainfrom

smoke:fix/opentelemetry-instrumentation-aws-lambda-inject-into-proper-custom-propsmoke/opentelemetry-js-contrib:fix/opentelemetry-instrumentation-aws-lambda-inject-into-proper-custom-propCopy head branch name to clipboard