Rollup merge of #129086 - slanterns:is_none_or, r=dtolnay

Rollup merge of #129086 - slanterns:is_none_or, r=dtolnay · patricklam/verify-rust-std@db3abec

Original file line number	Diff line number	Diff line change
`@@ -656,8 +656,6 @@ impl<T> Option<T> {`
`656`	`656`	`/// # Examples`
`657`	`657`	`///`
`658`	`658`	/// ```
`659`		`- /// #![feature(is_none_or)]`
`660`		`- ///`
`661`	`659`	`/// let x: Option<u32> = Some(2);`
`662`	`660`	`/// assert_eq!(x.is_none_or(\|x\| x > 1), true);`
`663`	`661`	`///`
`@@ -669,7 +667,7 @@ impl<T> Option<T> {`
`669`	`667`	/// ```
`670`	`668`	`#[must_use]`
`671`	`669`	`#[inline]`
`672`		`-#[unstable(feature = "is_none_or", issue = "126383")]`
	`670`	`+#[stable(feature = "is_none_or", since = "CURRENT_RUSTC_VERSION")]`
`673`	`671`	`pub fn is_none_or(self, f: impl FnOnce(T) -> bool) -> bool {`
`674`	`672`	`match self {`
`675`	`673`	`None => true,`