Add uplifting from `scf.while` to `scf.for`.
This uplifting expects a very specific ops pattern:
* `before` block consisting of single `arith.cmp` op
* `after` block containing `arith.addi`
We also have a set of patterns to cleanup `scf.while` loops to get them
close to the desired form, they will be added in separate PRs.
This is part of upstreaming `numba-mlir` scf uplifting pipeline: `cf ->
scf.while -> scf.for -> scf.parallel`
Original code:
https://github.com/numba/numba-mlir/blob/main/mlir/lib/Transforms/PromoteToParallel.cpp
