include missing headers

`std::alignment_of` is in `type_traits`, `std::exception_ptr` is in
<exxception> so they need to be included.
Fixes a compile error with xcode when compiling in c++23.

common/sys/vector.h

@@ -5,6 +5,7 @@
 
 #include "alloc.h"
 #include <algorithm>
+#include <type_traits>
 
 namespace embree
 {

common/tasking/taskschedulerinternal.h

@@ -14,6 +14,7 @@
 #include "../sys/atomic.h"
 #include "../math/range.h"
 
+#include <exception>
 #include <list>
 
 namespace embree