`for x in children.iter()` works in `html!` but `for x in &children` does not

Problem

The for loop syntax in html! requires children.iter() to compile, but does not accept &children, which is the idiomatic Rust form and what clippy's explicit_iter_loop lint likes.

Minimal Reproduction

This compiles:

#[derive(Clone, PartialEq, Properties)]
pub struct WrapperProps {
    pub children: Children,
}

#[component]
fn Wrapper(props: &WrapperProps) -> Html {
    html! {
        <ul>
            for child in props.children.iter() {
                <li>{child}</li>
            }
        </ul>
    }
}

This does not:

#[component]
fn Wrapper(props: &WrapperProps) -> Html {
    html! {
        <ul>
            for child in &props.children {
                <li>{child}</li>
            }
        </ul>
    }
}

Expected behavior
both should compile

Environment:

• Yew version: [0.23.0]

Questionnaire

• I'm interested in fixing this myself but don't know where to start
• I would like to fix and I have a solution
• I don't have time to fix this right now, but maybe later

Start by tracing how the html! macro handles for-loop expressions, using the two minimal reproductions in the issue to compare children.iter() with &props.children. Verify the change against both forms and add or run regression coverage showing that both compile and render the child items.