[mlir][sparse] Canonicalizing arguments to genReshapeDstShape and foreachInSparseConstant

These functions don't need a`PatternRewriter`, they only need an `OpBuilder`.  And, the builder should be the first argument, before the `Location`, to match the style used everywhere else in MLIR.

Reviewed By: aartbik

Differential Revision: https://reviews.llvm.org/D148059