compiler builtin detection failing for nvcc

Summary:
cuda 12.5 & platform010 w/ clang-15 seem to choke on this builtin. It seems like NVCC started to incorrectly report that it supports this builtin, but then doesn't provide the implementation.

It seems like this builtin is very rarely used in fbsource. I can only find one reference:
https://www.internalfb.com/code/fbsource/[df6fa76c6cd1d4956407c84ee5cf1f645255cb98]/xplat/thrift/lib/cpp/util/VarintUtils-inl.h?lines=474
so the surface area for failures should be pretty small

Reviewed By: Gownta

Differential Revision: D67039459

fbshipit-source-id: a2b9ebcb5dec12de2bdd7b95686da3c7a50764bd

third-party/folly/src/folly/lang/Hint-inl.h

@@ -51,7 +51,7 @@ FOLLY_ALWAYS_INLINE void compiler_may_unsafely_assume_separate_storage(
     void const* const a, void const* const b) {
   FOLLY_SAFE_DCHECK(
       a != b, "compiler-hint separate storage assumption fails at runtime");
-#if FOLLY_HAS_BUILTIN(__builtin_assume_separate_storage)
+#if FOLLY_HAS_BUILTIN(__builtin_assume_separate_storage) && !defined(__CUDACC__)
   __builtin_assume_separate_storage(a, b);
 #endif
 }