Allow @ConstructorBinding to be optional

This commit makes @ConstructorBinding optional for a type
that has a single parameterized constructor. An @Autowired annotation
on any of the constructors indicates that the type should not be constructor
bound.

Since @ConstructorBinding is now deduced for a single parameterized constructor,
the annotation is no longer needed at the type level.

Closes gh-23216

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/web/client/ExampleProperties.java

@@ -27,7 +27,6 @@ import org.springframework.boot.context.properties.bind.DefaultValue;
  *
  * @author Stephane Nicoll
  */
-@ConstructorBinding
 @ConfigurationProperties("example")
 public class ExampleProperties {