This is to track the progress of nativeaot port on riscv64 architecture. WIP initial translation (based on @sunlijun-610's [LA64 port](https://github.com/dotnet/runtime/pulls?q=sort%3Aupdated-desc+is%3Apr+label%3Aarch-loongarch64+label%3Aarea-NativeAOT-coreclr+is%3Aclosed)): https://github.com/dotnet/runtime/compare/main...am11:runtime:feature/nativeaot/riscv64-port