Let the ytdl file QueryType::as_cow_str accept an additional website parameter

[ChengCY-2254]

Because I want to obtain audio from other sources, I want to add a web_site parameter.

Just like this:

impl<'a> QueryType<'a> {
    fn as_cow_str(&'a self,web_site:&str, n_results: usize) -> Cow<'a, str> {
        match self {
            Self::Url(Cow::Owned(u)) => Cow::Borrowed(u),
            Self::Url(Cow::Borrowed(u)) => Cow::Borrowed(u),
            Self::Search(s) => Cow::Owned(format!("{web_site}:{n_results}:{s}")),
        }
    }
}

This is the original method

impl<'a> QueryType<'a> {
    fn as_cow_str(&'a self, n_results: usize) -> Cow<'a, str> {
        match self {
            Self::Url(Cow::Owned(u)) => Cow::Borrowed(u),
            Self::Url(Cow::Borrowed(u)) => Cow::Borrowed(u),
            Self::Search(s) => Cow::Owned(format!("ytsearch{n_results}:{s}")),
        }
    }
}

I'm not very good at English, so I'm using a translator to write this issue, hoping to express my meaning.