Use PoolingAsyncValueTaskMethodBuilder on ReadStreamMessageAsync method (#1850)

Co-authored-by: James Newton-King <james@newtonking.com>

Author: mayuki

src/Grpc.AspNetCore.Server/Internal/PipeExtensions.cs

@@ -21,6 +21,7 @@
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.IO.Pipelines;
+using System.Runtime.CompilerServices;
 using Grpc.Core;
 using Grpc.Net.Compression;
 using Microsoft.Extensions.Logging;
@@ -280,6 +281,9 @@ public static async ValueTask<T> ReadSingleMessageAsync<T>(this PipeReader input
         /// <param name="deserializer">Message deserializer.</param>
         /// <param name="cancellationToken">The cancellation token.</param>
         /// <returns>Complete message data or null if the stream is complete.</returns>
+#if NET6_0_OR_GREATER
+        [AsyncMethodBuilder(typeof(PoolingAsyncValueTaskMethodBuilder<>))]
+#endif
         public static async ValueTask<T?> ReadStreamMessageAsync<T>(this PipeReader input, HttpContextServerCallContext serverCallContext, Func<DeserializationContext, T> deserializer, CancellationToken cancellationToken = default)
             where T : class
         {