[llvm] [RISCV][CostModel] Add getCFInstrCost RISC-V implementation (PR #65599)

[Philip Reames via llvm-commits]

preames wrote:

This seems to be in sync with what other targets do, and makes sense.  Have you evaluated this at all for practical LV impact?  The vectorization test changes look pretty mild, have you tried this on anything larger?

https://github.com/llvm/llvm-project/pull/65599