Auto merge of #106458 - albertlarsan68:move-tests, r=jyn514

Move src/test to the root

See MCP at rust-lang/compiler-team#573

There may be more changes needed.

The first commit is just the move of the files:
You can check that the first commit did not do anything else than renames by running
```
git diff --diff-filter=r -M100% <rust-lang remote>/master <first commit hash>
```
The output should be empty, because the filter excludes renames, and the match threshold for qualifying a rename is 100%.

The second one is mostly a "find and replace" of `src/test` to `tests` and whatever is needed to make CI pass.

What is left to do:
---

- [x] Move directory
- [ ] Change references to `src/test`
    - [x] Change references in-tree
    - [ ] Change references in submodules / out-of-tree docs
- [x] Make CI pass:
    - [x] Fix tidy
    - [x] Fix tests
    - [x] Bless tests if needed (shouldn't normally)
- [ ] Merge it !

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/ui/consts/async-block.rs b/tests/ui/consts/async-block.rs
new file mode 100644
index 00000000000..78ec8aea724
--- /dev/null
+++ b/tests/ui/consts/async-block.rs
@@ -0,0 +1,19 @@
+// gate-test-const_async_blocks
+
+// edition:2018
+// revisions: with_feature without_feature
+
+#![feature(rustc_attrs)]
+#![cfg_attr(with_feature, feature(const_async_blocks))]
+
+use std::future::Future;
+
+// From <https://github.com/rust-lang/rust/issues/77361>
+const _: i32 = { core::mem::ManuallyDrop::new(async { 0 }); 4 };
+//[without_feature]~^ `async` block
+
+static _FUT: &(dyn Future<Output = ()> + Sync) = &async {};
+//[without_feature]~^ `async` block
+
+#[rustc_error]
+fn main() {} //[with_feature]~ fatal error triggered by #[rustc_error]