[llvm] [RISCV] Optimize `(and (i1) f, (setcc a, b, eq))` to use the zicond extension (PR #217946)

[Craig Topper via llvm-commits]

topperc wrote:

Please put new tests in a separate commit within the PR showing the current codegen. Then apply the codegen and test update in a second commit.

https://github.com/llvm/llvm-project/pull/217946