MAINT Include tuple in 'utils/strided_iters.hpp'

This include directive seems to have been forgotten and it is impossible
for me to compile dpctl without it.

Author: jjerphan

dpctl/tensor/libtensor/include/utils/strided_iters.hpp

@@ -30,6 +30,7 @@
 #include <array>
 #include <numeric> // std::iota
 #include <vector>
+#include <tuple>
 
 /* An N-dimensional array can be stored in a single
  * contiguous chunk of memory by contiguously laying