[mlir] Transform op for multitile size generation

[mlir] Transform op for multitile size generation

Introduce a structured transform op that emits IR computing the multi-tile
sizes with requested parameters (target size and divisor) for the given
structured op. The sizes may fold to arithmetic constant operations when the
shape is constant. These operations may then be used to call the existing
tiling transformation with a single non-zero dynamic size (i.e. perform
strip-mining) for each of the dimensions separately, thus achieving multi-size
tiling with optional loop interchange. A separate test exercises the entire
script.

Depends On D129217

Reviewed By: nicolasvasilache

Differential Revision: https://reviews.llvm.org/D129287