Bump github.com/open-telemetry/opentelemetry-collector-contrib/receiver/signalfxreceiver from 0.121.0 to 0.127.0 in /functional_tests

Bump github.com/open-telemetry/opentelemetry-collector-contrib/receiver/signalfxreceiver from 0.121.0 to 0.127.0 in /functional_tests #2711