[llvm] [RISCV][VLOPT] Allow propagation even when VL isn't VLMAX (PR #112228)

[Michael Maitland via llvm-commits]

michaelmaitland wrote:

> The vdot_lane_s32 is incorrectly optimized

Sorry, I forgot to rebase. I have rebased and regenerated test checks.

https://github.com/llvm/llvm-project/pull/112228