[mlir][sparse] sparse vectorization pattern not recognized

[PeimingLiu]

Test mlir/test/Dialect/SparseTensor/sparse_vector_mv.mlir is currently disabled due to a recent change on sparse tensor dialect. Need to be re-enabled.

[llvmbot]

@llvm/issue-subscribers-mlir-sparse

Author: Peiming Liu (PeimingLiu)

Test `mlir/test/Dialect/SparseTensor/sparse_vector_mv.mlir` is currently disabled due to a recent change on sparse tensor dialect. Need to be re-enabled.

[aartbik]

Made the vectorizer a bit more robust on position of invariant.