Runs opt-in OTLP/HTTP conformance against OpenTelemetry Collector 0.160.0.
mix otlp_shipper.conformanceRequires a running local Docker engine and the image printed in the README
pulled beforehand. No arguments are accepted. Publishes an ephemeral loopback
port, sends synthetic gzip logs and all four metric types from a separate VM,
and checks the Collector's detailed debug output. The child VM receives no
inherited OTEL_* configuration. The task removes its own container on exit;
interrupted/killed VMs may require manual cleanup of the printed container name.
It does not run in the default test suite or CI.