[Serializer] Fix deserializing of nested snake_case attributes using CamelCaseToSnakeCaseNameConverter

[Victor-Truhanovich]

Q	A
Branch?	6.3
Bug fix?	yes
New feature?	no
Deprecations?	no
License	MIT

It was not possible to deserialize nested attributes using CamelCaseToSnakeCaseNameConverter

Example

readonly class Foo {
    public function __conctruct(
        #[SerializedPath("[one][two_three]")]
        public $fooBar,
    ) {
    }
}

$factory = new ClassMetadataFactory(new AnnotationLoader(new AnnotationReader()));
$normalizer = new ObjectNormalizer($factory, new CamelCaseToSnakeCaseNameConverter());
$serializer = new Serializer([$normalizer]);

$data = [
    'one' => [
        'two_three' => 'fooBar',
    ],
];
$foo = $serializer->denormalize($data, Foo::class, 'any');

[Victor-Truhanovich]

The PR was recreated because Milestone was not appointed in PR #51394

[mtarld]

Thank you @Victor-Truhanovich 🙂

[mtarld]

Just one last thing, you should take care about fabbot errors: https://fabbot.io/report/symfony/symfony/51399/418bdea59c858a48dca18e493353454e16628aa1

[mtarld]

Oh, sorry my bad, I didn't check why fabbot was yelling... Actually it's a false positive, the comments are legit here!

[Victor-Truhanovich]

@mtarld I rollbacked code style changes

[nicolas-grekas]

Thank you @Victor-Truhanovich.