fix(metadata): various parameter improvements

[soyuka]

Q	A
Branch?	3.4

• Parameter::getValue() now takes a default value as argument getValue(mixed $default = new ParameterNotFound()): mixed
• Parametes::get(string $key, string $parameterClass = QueryParameter::class) (but also has and remove) now has a default value as second argument to QueryParameter::class
• Constraint violation had the wrong message when using property, fixed by using the key instead:

#[QueryParameter(property: 'id', key: 'int', constraints: [new Assert\Type('integer')], provider: [self::class, 'toInt']))]

-id: This value should be of type integer.
+int: This value should be of type integer.

See the `toInt` provider.

    public static function toInt(Parameter $parameter, array $parameters = [], array $context = []): ?Operation
    {
        if (null === ($operation = $context['operation'] ?? null)) {
            return null;
        }

        $value = $parameter->getValue();

        if (is_numeric($value)) {
            $value = (int) $value;
        }

        $parameters = $operation->getParameters();
        $parameters->add($parameter->getKey(), $parameter = $parameter->withExtraProperties(
            $parameter->getExtraProperties() + ['_api_values' => $value]
        ));

        return $operation->withParameters($parameters);
    }

Note that in the future I'd like to introduce "parameter transformers" to do some parameter value transformation. Stay tuned!