This patch works towards the simplification proposal [0] of Nick Knight. After this patch, we have reduced the hierarchy of intrinsics from two sets (non-policy and policy) into a single set, with a general assumption that policy behavior is agnostic unless specified. [0] https://gist.github.com/nick-knight/6cb0b74b351a25323dfb1821d3a269b9 Pull Request: riscv-non-isa/rvv-intrinsic-doc#186. Depends on D141796. Reviewed By: craig.topper, kito-cheng Differential Revision: https://reviews.llvm.org/D142016