Auto merge of rust-lang#95818 - petrochenkov:stabundle, r=wesleywiser

Stabilize the `bundle` native library modifier

And remove the legacy `static-nobundle` linking kind.

Stabilization report - rust-lang#95818 (comment).

cc rust-lang#81490
Closes rust-lang#37403

Author: bors

unwind/src/lib.rs

@@ -1,7 +1,7 @@
 #![no_std]
 #![unstable(feature = "panic_unwind", issue = "32837")]
 #![feature(link_cfg)]
-#![feature(native_link_modifiers_bundle)]
+#![cfg_attr(bootstrap, feature(native_link_modifiers_bundle))]
 #![feature(staged_api)]
 #![feature(c_unwind)]
 #![feature(cfg_target_abi)]