Try to stabilize OpenTelemetryMetricsContainerConnectionDetailsFactoryIntegrationTests

[wilkinsona]

connectionCanBeMadeToOpenTelemetryCollectorContainer sometimes fails because the OpenTelemetry collector running in the container doesn't respond quickly enough. We currently make two scrape attempts, one that uses Awaitility and will be retried if needed and one that does not. We're not testing the stability of the OpenTelemetry collector but our ability to correctly create connection details that can connect to it. We could hopefully improve things by making a single scrape attempt that uses Awaitility.