[NativeAOT] Handle variable page size on Linux Arm64

Linux Arm64 can run with 64kB pages. More context: https://github.com/dotnet/runtime/pull/75513#issuecomment-1248756877 and https://github.com/dotnet/runtime/pull/75513#issuecomment-1248798080