Auto merge of rust-lang#144249 - GuillaumeGomez:asm-tests, r=jieyouxu

Rename `tests/{assembly,codegen}` into `tests/{assembly,codegen}-llvm` and ignore these testsuites if configured backend doesn't match

Follow-up of rust-lang#144125.

This PR changes `compiletest` so that `asm` tests are only run if they match the current codegen backend. To better reflect it, I renamed the `tests/ui/asm` folder into `tests/ui/asm-llvm`. Like that, we can add new asm tests for other backends if we want without needing to add extra code to `compiletest`.

Next step will be to use the new code annotations added in rust-lang#144125 to ignore ui tests failing in cg_gcc until it's fixed on our side.

cc `@antoyo` `@oli-obk`
r? `@Kobzol`

Author: bors

alloc/src/collections/vec_deque/drain.rs

@@ -192,7 +192,7 @@ impl<T, A: Allocator> Drop for Drain<'_, T, A> {
                     // this branch is never taken.
                     // We use `#[cold]` instead of `#[inline(never)]`, because inlining this
                     // function into the general case (`.drain(n..m)`) is fine.
-                    // See `tests/codegen/vecdeque-drain.rs` for a test.
+                    // See `tests/codegen-llvm/vecdeque-drain.rs` for a test.
                     #[cold]
                     fn join_head_and_tail_wrapping<T, A: Allocator>(
                         source_deque: &mut VecDeque<T, A>,

alloc/src/raw_vec/mod.rs

@@ -761,7 +761,7 @@ impl<A: Allocator> RawVecInner<A> {
 }
 
 // not marked inline(never) since we want optimizers to be able to observe the specifics of this
-// function, see tests/codegen/vec-reserve-extend.rs.
+// function, see tests/codegen-llvm/vec-reserve-extend.rs.
 #[cold]
 fn finish_grow<A>(
     new_layout: Layout,