[BUG] [Swift5] Name collision with a query param named "path"

[Eugeny]

The Swift5 generator doesn't rename the optional path query param, resulting in code like this:

    open class func getAllMediaFilesWithRequestBuilder(..., path: String? = nil, ...) ... {
        let path = "/api/2/media/files"
         
        ...

        urlComponents?.queryItems = APIHelper.mapValuesToQueryItems([
            ...
            "path": path?.encodeToJSON(),
                        ^-- Cannot use optional chaining on non-optional value of type 'String'