Fontify destructor in c++-ts-mode

* lisp/progmodes/c-ts-mode.el (c-ts-mode--font-lock-settings):
Add a rule for destructors.  (Bug#71872)

lisp/progmodes/c-ts-mode.el

@@ -674,7 +674,9 @@ MODE is either `c' or `cpp'."
    :language mode
    :feature 'definition
    ;; Highlights identifiers in declarations.
-   `((declaration
+   `(,@(when (eq mode 'cpp)
+         '((destructor_name (identifier) @font-lock-function-name-face)))
+     (declaration
       declarator: (_) @c-ts-mode--fontify-declarator)
 
      (field_declaration