[RISC-V] Use fine-grained fence variants for memory barriers#126566

jakobbotsch merged 2 commits intodotnet:maindotnet/runtime:mainfrom

JamieMagee:dev/riscv64-fine-grained-barriersJamieMagee/runtime:dev/riscv64-fine-grained-barriersCopy head branch name to clipboard