Support NestedConfigurationProperty for record types

Add ElementType.RECORD_COMPONENT to NestedConfigurationProperty and
implement isMarkedAsNested for RecordParameterPropertyDescriptor.

This will allow nested records to be properly harvested for their
properties.

See gh-41251

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/NestedConfigurationProperty.java

@@ -38,7 +38,7 @@ import org.springframework.boot.context.properties.bind.Nested;
  * @author Phillip Webb
  * @since 1.2.0
  */
-@Target(ElementType.FIELD)
+@Target({ ElementType.FIELD, ElementType.RECORD_COMPONENT })
 @Retention(RetentionPolicy.RUNTIME)
 @Documented
 @Nested