[clang] [Clang][RISCV] Add operator overloading for builtin RVV vector types (PR #192722)

[Philip Reames via cfe-commits]

preames wrote:

@ camel-cdr - Your last couple comments seem rather disconnected from this review.  Can I ask that you move the discussion on other enhancements to e.g. https://github.com/riscv-non-isa/riscv-rvv-intrinsic-doc/issues/291?  To be clear, I'm not opposed to also improving or extending other mechanisms; I just think they should be discussed individually and not have the discussion co-mingled here. 

https://github.com/llvm/llvm-project/pull/192722