[mlir][sparse] complete migration to dim2lvl/lvl2dim in library (#69268)

This last revision completed the migration to non-permutation support in
the SparseTensor library. All mappings are now controlled by the MapRef
(forward and backward). Unused code has been removed, which simplifies
subsequent testing of block sparsity.

Author: aartbik

mlir/include/mlir/ExecutionEngine/SparseTensor/File.h

@@ -201,10 +201,11 @@ class SparseTensorReader final {
                    const uint64_t *lvl2dim) {
     const uint64_t dimRank = getRank();
     MapRef map(dimRank, lvlRank, dim2lvl, lvl2dim);
-    auto *coo = readCOO<V>(map, lvlSizes);
+    auto *lvlCOO = readCOO<V>(map, lvlSizes);
     auto *tensor = SparseTensorStorage<P, I, V>::newFromCOO(
-        dimRank, getDimSizes(), lvlRank, lvlTypes, dim2lvl, lvl2dim, *coo);
-    delete coo;
+        dimRank, getDimSizes(), lvlRank, lvlSizes, lvlTypes, dim2lvl, lvl2dim,
+        *lvlCOO);
+    delete lvlCOO;
     return tensor;
   }