Allow usage of @CheckReturnValue on types and ctors

Closes gh-34910

Author: sdeleuze

spring-core/src/main/java/org/springframework/lang/CheckReturnValue.java

@@ -33,10 +33,13 @@
  * and the return value is only interesting when adding an element to a set,
  * to see if the set already contained that element before.
  *
+ * <p>When used on a type, the annotation applies to all constructors and all
+ * methods that do not return {@code void}.
+ *
  * @author Sebastien Deleuze
  * @since 6.2
  */
 @Documented
-@Target(ElementType.METHOD)
+@Target({ElementType.TYPE, ElementType.METHOD, ElementType.CONSTRUCTOR})
 public @interface CheckReturnValue {
 }