refactor(tests): consolidate FakeWorkerProcess onto TestSupport canonical

src/ZB.MOM.WW.MxGateway.Tests/Gateway/Workers/WorkerProcessLauncherTests.cs

@@ -4,6 +4,7 @@ using ZB.MOM.WW.MxGateway.Contracts;
 using ZB.MOM.WW.MxGateway.Server.Configuration;
 using ZB.MOM.WW.MxGateway.Server.Metrics;
 using ZB.MOM.WW.MxGateway.Server.Workers;
+using ZB.MOM.WW.MxGateway.Tests.TestSupport;
 
 namespace ZB.MOM.WW.MxGateway.Tests.Gateway.Workers;
 
@@ -240,45 +241,6 @@ public sealed class WorkerProcessLauncherTests
         }
     }
 
-    /// <summary>Fake worker process for testing process lifecycle and exit behavior.</summary>
-    private sealed class FakeWorkerProcess(int processId) : IWorkerProcess
-    {
-        /// <inheritdoc />
-        public int Id { get; } = processId;
-
-        /// <summary>Gets or sets a value indicating whether the process has exited.</summary>
-        public bool HasExited { get; set; }
-
-        /// <summary>Gets or sets the process exit code.</summary>
-        public int? ExitCode { get; set; }
-
-        /// <summary>Gets a value indicating whether the Dispose method was called.</summary>
-        public bool DisposeCalled { get; private set; }
-
-        /// <summary>Gets a value indicating whether the Kill method was called.</summary>
-        public bool KillCalled { get; private set; }
-
-        /// <inheritdoc />
-        public ValueTask WaitForExitAsync(CancellationToken cancellationToken)
-        {
-            return ValueTask.CompletedTask;
-        }
-
-        /// <inheritdoc />
-        public void Kill(bool entireProcessTree)
-        {
-            Assert.True(entireProcessTree);
-            KillCalled = true;
-            HasExited = true;
-        }
-
-        /// <inheritdoc />
-        public void Dispose()
-        {
-            DisposeCalled = true;
-        }
-    }
-
     /// <summary>Fake startup probe that immediately succeeds.</summary>
     private sealed class SucceedingStartupProbe : IWorkerStartupProbe
     {