Unrolled build for rust-lang#136663

Rollup merge of rust-lang#136663 - WaffleLapkin:count-non-zero-ones, r=cuviper

Stabilize `NonZero::count_ones`

As per rust-lang#120287 (comment)

r? libs

Author: rust-timer

library/core/src/num/nonzero.rs

@@ -612,8 +612,6 @@ macro_rules! nonzero_integer {
             /// Basic usage:
             ///
             /// ```
-            /// #![feature(non_zero_count_ones)]
-            ///
             /// # use std::num::NonZero;
             /// #
             /// # fn main() { test().unwrap(); }
@@ -627,7 +625,8 @@ macro_rules! nonzero_integer {
             /// # }
             /// ```
             ///
-            #[unstable(feature = "non_zero_count_ones", issue = "120287")]
+            #[stable(feature = "non_zero_count_ones", since = "CURRENT_RUSTC_VERSION")]
+            #[rustc_const_stable(feature = "non_zero_count_ones", since = "CURRENT_RUSTC_VERSION")]
             #[doc(alias = "popcount")]
             #[doc(alias = "popcnt")]
             #[must_use = "this returns the result of the operation, \