nixos/opentelemetry-collector: fix tests (#413597)

      services.opentelemetry-collector = {

        enable = true;

        settings = {

          exporters.logging.verbosity = "detailed";

          exporters.debug.verbosity = "detailed";

          receivers.otlp.protocols = {

            http.endpoint = "0.0.0.0:${toString port}";

          };

          service = {

            pipelines.logs = {

              receivers = [ "otlp" ];

              exporters = [ "logging" ];

              exporters = [ "debug" ];

            };

          };

        };