[llvm] [RISCV] Add tests where bin ops of splats could be scalarized. NFC (PR #65747)

[Michael Maitland via llvm-commits]

michaelmaitland wrote:

I want to echo @topperc’s concern that if VL is zero for a div then we should not scalarize since that would lead to division by zero in scalar land, but in vector land no division occurs. 

Can we explicitly test this case?

https://github.com/llvm/llvm-project/pull/65747