Add a few sizes of interest for the 4D transpose bench.
Add a few sizes of interest for the 4D transpose bench.

Also add baseline experts that do not exhibit catastrophic unrolling.

PiperOrigin-RevId: 408873792

iree-org/iree-llvm-sandbox,iree-org/iree-llvm-sandbox,iree-org/iree-llvm-sandbox,iree-org/iree-llvm-sandbox