Start using `#[diagnostic::do_not_recommend]` in the standard library

Start using `#[diagnostic::do_not_recommend]` in the standard library · model-checking/verify-rust-std@d0bc9a0

Original file line number	Diff line number	Diff line change
`@@ -1990,7 +1990,7 @@ impl<T, E, F: From<E>> ops::FromResidual<Result<convert::Infallible, E>> for Res`
`1990`	`1990`	`}`
`1991`	`1991`	`}`
`1992`	`1992`	`}`
`1993`		`-`
	`1993`	`+#[diagnostic::do_not_recommend]`
`1994`	`1994`	`#[unstable(feature = "try_trait_v2_yeet", issue = "96374")]`
`1995`	`1995`	`impl<T, E, F: From<E>> ops::FromResidual<ops::Yeet<E>> for Result<T, F> {`
`1996`	`1996`	`#[inline]`