[mlir][sparse] Adding Action::kSparseToSparse for @newSparseTensor

This is work towards: https://github.com/llvm/llvm-project/issues/51652

This differential doesn't yet make use of the new kSparseToSparse, just introduces it.  The differential that finally makes use of them is D122061, which is the final differential in the chain that fixes bug 51652.

Depends On D122054

Reviewed By: aartbik

Differential Revision: https://reviews.llvm.org/D122055