Auto merge of #82043 - tmiasko:may-have-side-effect, r=kennytm

Turn may_have_side_effect into an associated constant

The `may_have_side_effect` is an implementation detail of `TrustedRandomAccess`
trait. It describes if obtaining an iterator element may have side effects. It
is currently implemented as an associated function.

Turn `may_have_side_effect` into an associated constant. This makes the
value immediately available to the optimizer.

library/core/src/str/iter.rs

@@ -321,10 +321,7 @@ unsafe impl TrustedLen for Bytes<'_> {}
 #[doc(hidden)]
 #[unstable(feature = "trusted_random_access", issue = "none")]
 unsafe impl TrustedRandomAccess for Bytes<'_> {
-    #[inline]
-    fn may_have_side_effect() -> bool {
-        false
-    }
+    const MAY_HAVE_SIDE_EFFECT: bool = false;
 }
 
 /// This macro generates a Clone impl for string pattern API