[CuTe] Add missing include for smem_ptr_flag_bits in print_tensor.hpp

[LeSingh1]

Summary

cute/util/print_tensor.hpp references smem_ptr_flag_bits<B> (line 92, in the print_layout overload for ComposedLayout), but its existing includes (config.hpp, layout.hpp, tensor_impl.hpp) do not transitively pull in cute/pointer_flagged.hpp, which is the header that defines smem_ptr_flag_bits.

In typical usage the header is reached via cute/tensor.hpp, which already includes pointer_flagged.hpp, so the bug is hidden. It surfaces when:

• a translation unit includes cute/util/print_tensor.hpp directly, or
• clangd parses the header in isolation (the symptom reported in [BUG] [CuTe] print_tensor.hpp missing include for cute/pointer_flagged.hpp #3205: "use of undeclared identifier 'smem_ptr_flag_bits'").

This patch adds the missing include so the header is self-contained.

Fix

 #include <cute/layout.hpp>
+#include <cute/pointer_flagged.hpp>  // cute::smem_ptr_flag_bits
 #include <cute/tensor_impl.hpp>

Mirrors the include style already used in cute/atom/mma_traits_sm90_gmma.hpp (#include <cute/pointer_flagged.hpp> // cute::smem_ptr_flag).

Verification

• Confirmed by inspection that none of config.hpp, layout.hpp, tensor_impl.hpp transitively include pointer_flagged.hpp.
• grep -rn "pointer_flagged" include/cute/ shows only tensor.hpp and mma_traits_sm90_gmma.hpp pulling it in elsewhere.
• I do not have an NVCC toolchain on this machine to build the full example suite; if CI catches anything unexpected I'll iterate.

Issue

Fixes #3205