[php-src] Issue #7912: ReflectionProperty::getDocComment not respect Enum Cases PHPDoc.

Issue: https://github.com/php/php-src/issues/7912 Author: michaljusiega ### Description The following code: ```php <?php enum TestEnum: string { /** Description about Case. */ case ABC = 'abc'; case XYZ = 'xyz'; /** @var string */ public const QWERTY = 'qwerty'; } $reflectionClass = new ReflectionClass(TestEnum::class); var_dump($reflectionClass->getProperties()[0]->getDocComment()); var_dump($reflectionClass->getProperties()[1]->getDocComment()); var_dump($reflectionClass->getReflectionConstants()[0]->getDocComment()); var_dump($reflectionClass->getReflectionConstants()[1]->getDocComment()); var_dump($reflectionClass->getReflectionConstants()[2]->getDocComment()); ``` Resulted in this output: ``` bool(false) bool(false) string(30) "/** Description about Case. */" bool(false) string(18) "/** @var string */" ``` But I expected this output instead: ``` string(30) "/** Description about Case. */" bool(false) string(30) "/** Description about Case. */" bool(false) string(18) "/** @var string */" ``` The link for 3v4l.org: https://3v4l.org/s1Lru ### PHP Version PHP 8.1.0 ### Operating System Any