Vulkan backend: Add missing include of cstdint (pytorch#15220)

backends/vulkan/runtime/utils/StorageUtils.h was referring to
definitions like `uint8_t` without including the header cstdint. This
resulted in a risk of facing compilation errors on some systems. Fix
this problem by including the header.

cc @SS-JIA @manuelcandales @digantdesai @cbilgin

Signed-off-by: Martin Lindström <[email protected]>
Co-authored-by: Martin Lindström <[email protected]>

Author: martinlsm

backends/vulkan/runtime/utils/StorageUtils.h

@@ -8,6 +8,7 @@
 
 #pragma once
 
+#include <cstdint>
 #include <ostream>
 
 namespace vkcompute {