Rollup merge of rust-lang#125455 - blyxyas:opt-clamp, r=joboet

Make `clamp` inline

Context: rust-lang/rust-clippy#12826
This results in slightly more optimized assembly. (And most important, it's now less than lines than just manually clamping a value)

Author: matthiaskrgr

library/core/src/cmp.rs

@@ -898,6 +898,7 @@ pub trait Ord: Eq + PartialOrd<Self> {
     /// assert_eq!(2.clamp(-2, 1), 1);
     /// ```
     #[must_use]
+    #[inline]
     #[stable(feature = "clamp", since = "1.50.0")]
     fn clamp(self, min: Self, max: Self) -> Self
     where