common/alignment: Fix VS2022 compilation

VS2022 seems to introduce an optimization when moving vectors to check for equality of the element values. AlignmentAllocator needed to overload the equality operator to fix compilation of its usage in vector moving.

src/common/alignment.h

@@ -64,7 +64,7 @@ public:
     using propagate_on_container_copy_assignment = std::true_type;
     using propagate_on_container_move_assignment = std::true_type;
     using propagate_on_container_swap = std::true_type;
-    using is_always_equal = std::true_type;
+    using is_always_equal = std::false_type;
 
     constexpr AlignmentAllocator() noexcept = default;
 
@@ -83,6 +83,11 @@ public:
     struct rebind {
         using other = AlignmentAllocator<T2, Align>;
     };
+
+    template <typename T2, size_t Align2>
+    constexpr bool operator==(const AlignmentAllocator<T2, Align2>&) const noexcept {
+        return std::is_same_v<T, T2> && Align == Align2;
+    }
 };
 
 } // namespace Common