Adding the possibility to use BackedEnumFilter on values 0, -1, -2 etc.

[boSBM]

Description
It is currently not possible to use the BackedEnumFilter on values below 1, currently i have a enum class starting at 0. I cannot use the BackedEnumFilter for this currently.

Example

$values = is_array($value) ? $value : [$value];

    $normalizedValues = array_values(array_filter(
        array_map(fn ($value) => $this->normalizeValue($value, $property), $values),
        static fn ($value) => null !== $value,
    ));