tests: add or delete copy/move ctors where needed to make type traits match reality (#5833)

tests/test_smart_ptr.cpp

@@ -161,6 +161,8 @@ public:
         print_created(this);
         pointer_set<MyObject4a>().insert(this);
     };
+    MyObject4a(const MyObject4a &) = delete;
+
     int value;
 
     static void cleanupAllInstances() {
@@ -182,6 +184,7 @@ protected:
 class MyObject4b : public MyObject4a {
 public:
     explicit MyObject4b(int i) : MyObject4a(i) { print_created(this); }
+    MyObject4b(const MyObject4b &) = delete;
     ~MyObject4b() override { print_destroyed(this); }
 };
 
@@ -189,6 +192,7 @@ public:
 class MyObject5 { // managed by huge_unique_ptr
 public:
     explicit MyObject5(int value) : value{value} { print_created(this); }
+    MyObject5(const MyObject5 &) = delete;
     ~MyObject5() { print_destroyed(this); }
     int value;
 };
@@ -245,6 +249,7 @@ struct SharedFromThisVirt : virtual SharedFromThisVBase {};
 // test_move_only_holder
 struct C {
     C() { print_created(this); }
+    C(const C &) = delete;
     ~C() { print_destroyed(this); }
 };
 
@@ -265,6 +270,7 @@ struct TypeForHolderWithAddressOf {
 // test_move_only_holder_with_addressof_operator
 struct TypeForMoveOnlyHolderWithAddressOf {
     explicit TypeForMoveOnlyHolderWithAddressOf(int value) : value{value} { print_created(this); }
+    TypeForMoveOnlyHolderWithAddressOf(const TypeForMoveOnlyHolderWithAddressOf &) = delete;
     ~TypeForMoveOnlyHolderWithAddressOf() { print_destroyed(this); }
     std::string toString() const {
         return "MoveOnlyHolderWithAddressOf[" + std::to_string(value) + "]";