Add System.IO.Pipelines to better support async

Manual port of #949 to main.

cc @stebet

Author: lukebakken

projects/RabbitMQ.Client/RabbitMQ.Client.csproj

@@ -65,6 +65,7 @@
     <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.0" PrivateAssets="All" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
     <PackageReference Include="MinVer" Version="2.4.0" PrivateAssets="All" />
+    <PackageReference Include="Pipelines.Sockets.Unofficial" Version="2.2.2" />
     <PackageReference Include="System.Threading.Channels" Version="5.0.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="5.0.3" PrivateAssets="All" />
   </ItemGroup>