[RISCV][CodeGen] Implement IR Intrinsic support for K extension

This revision implements IR Intrinsic support for RISCV Scalar Crypto extension according to the specification of version [[ https://github.com/riscv/riscv-crypto/releases/tag/v1.0.0-scalar | 1.0]]
Co-author：@ksyx & @VincentWu & @lihongliang & @achieveartificialintelligence

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D102310