Add back obsolete attributes to IActionContextAccessor interface and ActionContextAccessor class

Co-authored-by: captainsafia <[email protected]>

Author: Copilot

src/Mvc/Mvc.Core/src/Infrastructure/ActionContextAccessor.cs

@@ -10,6 +10,7 @@ namespace Microsoft.AspNetCore.Mvc.Infrastructure;
 /// <summary>
 /// Type that provides access to an <see cref="ActionContext"/>.
 /// </summary>
+[Obsolete("ActionContextAccessor is obsolete. Use IHttpContextAccessor instead and access the endpoint information from  HttpContext.GetEndpoint(). This type will be removed in a future version.")]
 public class ActionContextAccessor : IActionContextAccessor
 {
     internal static readonly IActionContextAccessor Null = new NullActionContextAccessor();

src/Mvc/Mvc.Core/src/Infrastructure/IActionContextAccessor.cs

@@ -10,6 +10,7 @@ namespace Microsoft.AspNetCore.Mvc.Infrastructure;
 /// <summary>
 /// Defines an interface for exposing an <see cref="ActionContext"/>.
 /// </summary>
+[Obsolete("IActionContextAccessor is obsolete. Use IHttpContextAccessor instead and access the endpoint information from  HttpContext.GetEndpoint(). This type will be removed in a future version.")]
 public interface IActionContextAccessor
 {
     /// <summary>