Rollup merge of #121758 - joboet:move_pal_thread_local, r=ChrisDenton

Move thread local implementation to `sys`

Part of #117276.

library/std/src/sys/mod.rs

@@ -9,6 +9,9 @@
 pub mod locks;
 pub mod os_str;
 pub mod path;
+#[allow(dead_code)]
+#[allow(unused_imports)]
+pub mod thread_local;
 
 // FIXME(117276): remove this, move feature implementations into individual
 //                submodules.

library/std/src/sys/pal/common/mod.rs

@@ -12,8 +12,6 @@
 
 pub mod alloc;
 pub mod small_c_string;
-#[allow(unused_imports)]
-pub mod thread_local;
 
 #[cfg(test)]
 mod tests;

library/std/src/thread/mod.rs

@@ -205,7 +205,7 @@
         #[doc(hidden)]
         #[unstable(feature = "thread_local_internals", issue = "none")]
         pub mod local_impl {
-            pub use crate::sys::common::thread_local::{thread_local_inner, Key, abort_on_dtor_unwind};
+            pub use crate::sys::thread_local::{thread_local_inner, Key, abort_on_dtor_unwind};
         }
     }
 }