Move Event Source setup to shared acceptance test projects

src/ServiceControl.AcceptanceTests/SetupFixture.cs

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+namespace ServiceControl.AcceptanceTests;
+
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
+using System.Threading;
+using System.Threading.Tasks;
+using NUnit.Framework;
+using ServiceBus.Management.Infrastructure.Installers;
+
+[SetUpFixture]
+public class SetupFixture
+{
+    [OneTimeSetUp]
+    public async Task Setup()
+    {
+        if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+        {
+            return;
+        }
+
+        // Every test runs the setup command, which creates the event source if it is missing. Tests run in
+        // parallel, so without creating it up front several of them race and all but one fail with
+        // "Source ServiceControl already exists".
+        EventSourceCreator.Create();
+
+        await WaitForSource(EventSourceCreator.SourceName);
+    }
+
+    //There is a delay for this becoming true, tests will fall over if they interleave in the wrong way.
+    [SupportedOSPlatform("windows")]
+    static async Task WaitForSource(string sourceName)
+    {
+        var cts = new CancellationTokenSource(TimeSpan.FromSeconds(60));
+        while (!EventLog.SourceExists(sourceName))
+        {
+            cts.Token.ThrowIfCancellationRequested();
+            await Task.Delay(500, CancellationToken.None);
+        }
+    }
+}

src/ServiceControl.Audit.AcceptanceTests/SetupFixture.cs

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+namespace ServiceControl.Audit.AcceptanceTests;
+
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
+using System.Threading;
+using System.Threading.Tasks;
+using NUnit.Framework;
+using ServiceControl.Audit.Infrastructure;
+
+[SetUpFixture]
+public class SetupFixture
+{
+    [OneTimeSetUp]
+    public async Task Setup()
+    {
+        if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+        {
+            return;
+        }
+
+        // Every test runs the setup command, which creates the event source if it is missing. Tests run in
+        // parallel, so without creating it up front several of them race and all but one fail with
+        // "Source ServiceControl.Audit already exists".
+        EventSourceCreator.Create();
+
+        await WaitForSource(EventSourceCreator.SourceName);
+    }
+
+    //There is a delay for this becoming true, tests will fall over if they interleave in the wrong way.
+    [SupportedOSPlatform("windows")]
+    static async Task WaitForSource(string sourceName)
+    {
+        var cts = new CancellationTokenSource(TimeSpan.FromSeconds(60));
+        while (!EventLog.SourceExists(sourceName))
+        {
+            cts.Token.ThrowIfCancellationRequested();
+            await Task.Delay(500, CancellationToken.None);
+        }
+    }
+}