new_without_default could include blanket impls

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What it does

Playground link

The existing new_without_default lint could be expanded to catch smart pointers that have a blanket impl Default, such as Arc, Mutex, etc.

Advantage

Expands on the advantages of the existing new_without_default lint.

Drawbacks

No response

Example

pub struct Bar;

impl Bar {
    #[expect(clippy::new_without_default)]
    pub fn new() -> std::sync::Arc<Self> { Arc::new(Self) }
}