Sparse methods: Do not use deprecated names

pytensor/sparse/variable.py

@@ -22,11 +22,11 @@ from pytensor.sparse.math import (
     gt,
     le,
     lt,
-    mul,
+    multiply,
     sp_sum,
     structured_conjugate,
     structured_dot,
-    sub,
+    subtract,
 )
 from pytensor.sparse.type import SparseTensorType
 from pytensor.sparse.utils import hash_from_sparse
@@ -88,16 +88,16 @@ class _sparse_py_operators:
         return add(left, right)
 
     def __sub__(left, right):
-        return sub(left, right)
+        return subtract(left, right)
 
     def __rsub__(right, left):
-        return sub(left, right)
+        return subtract(left, right)
 
     def __mul__(left, right):
-        return mul(left, right)
+        return multiply(left, right)
 
     def __rmul__(left, right):
-        return mul(left, right)
+        return multiply(left, right)
 
     # comparison operators