Add Azure Open Telemetry Exporter

[RehanSaeed]

Add this once it comes out of beta.

using Azure.Monitor.OpenTelemetry.Exporter;
using OpenTelemetry.Trace;

OpenTelemetry.Sdk.CreateTracerProviderBuilder()
    .AddSource("Demo.DemoClient")
    .AddAzureMonitorTraceExporter(o => {
        o.ConnectionString = "<Your Connection String>";
    })
    .Build();

https://github.com/Azure/azure-sdk-for-net/tree/main/sdk/monitor/Azure.Monitor.OpenTelemetry.Exporter