Forward-port the Virtualize MaxItemCount added in .NET 8 patch to .NET 9 RC1#57400

wtgodbe merged 2 commits intorelease/9.0-rc1dotnet/aspnetcore:release/9.0-rc1from

stevesa/port-virtualize-maxitemcountdotnet/aspnetcore:stevesa/port-virtualize-maxitemcountCopy head branch name to clipboard