fix(metadata): operation parameters take precedence over parameter attributes on properties

[Maxcastel]

Q	A
Branch?	5.0
Tickets	n/a
License	MIT
Doc PR	n/a

A parameter attribute declared on a property replaces the parameter with the same key explicitly declared on the operation, so it is impossible to customize it for one operation. Everywhere else the most specific declaration wins (resource/global parameters, defaults.parameters).

Before

#[ApiResource(operations: [
    new GetCollection(parameters: ['name' => new QueryParameter(description: 'From operation', required: false)]),
    new Get(),
])]
class Book
{
    #[QueryParameter(description: 'From property', required: true)]
    public string $name = '';
}

GetCollection gets the property parameter (required: true, "From property"): the operation declaration is lost.

After

GetCollection keeps its own parameter (required: false, "From operation"); Get still gets the property parameter.