Allow to dispose linked resources on pipeline disposal

src/Polly.Core/Utils/Pipeline/ComponentWithDisposeCallbacks.cs

@@ -7,7 +7,7 @@ internal class ComponentWithDisposeCallbacks : PipelineComponent
     public ComponentWithDisposeCallbacks(PipelineComponent component, List<Action> callbacks)
     {
         Component = component;
-        _callbacks = callbacks.ToList();
+        _callbacks = callbacks;
     }
 
     internal PipelineComponent Component { get; }

src/Polly.Core/Utils/Pipeline/PipelineComponentFactory.cs

@@ -14,14 +14,14 @@ internal static class PipelineComponentFactory
 
     public static PipelineComponent FromStrategy<T>(ResilienceStrategy<T> strategy) => new BridgeComponent<T>(strategy);
 
-    public static PipelineComponent WithDisposableCallbacks(PipelineComponent component, List<Action> callbacks)
+    public static PipelineComponent WithDisposableCallbacks(PipelineComponent component, IEnumerable<Action> callbacks)
     {
-        if (callbacks.Count == 0)
+        if (!callbacks.Any())
         {
             return component;
         }
 
-        return new ComponentWithDisposeCallbacks(component, callbacks);
+        return new ComponentWithDisposeCallbacks(component, callbacks.ToList());
     }
 
     public static PipelineComponent CreateComposite(

test/Polly.Core.Tests/Utils/Pipeline/ComponentWithDisposeCallbacksTests.cs

@@ -39,7 +39,7 @@ public async Task Dispose_Ok(bool isAsync)
         }
 
         // Assert
-        callbacks.Should().HaveCount(2);
+        callbacks.Should().BeEmpty();
         called1.Should().Be(1);
         called2.Should().Be(1);
     }

test/Polly.Core.Tests/Utils/Pipeline/PipelineComponentFactoryTests.cs

@@ -17,7 +17,7 @@ public void WithDisposableCallbacks_NoCallbacks_ReturnsOriginalComponent()
     public void PipelineComponentFactory_Should_Return_WrapperComponent_With_Callbacks()
     {
         var component = Substitute.For<PipelineComponent>();
-        List<Action> callbacks = new List<Action> { () => { } };
+        var callbacks = new List<Action> { () => { } };
 
         var result = PipelineComponentFactory.WithDisposableCallbacks(component, callbacks);