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, 0 insertions, 21 deletions

diff --git a/src/test/ui/iterators/iter-position-overflow-debug.rs b/src/test/ui/iterators/iter-position-overflow-debug.rs
deleted file mode 100644
index 7a871e744c9..00000000000
--- a/src/test/ui/iterators/iter-position-overflow-debug.rs
+++ /dev/null
@@ -1,21 +0,0 @@
-// run-pass
-// only-32bit too impatient for 2⁶⁴ items
-// needs-unwind
-// compile-flags: -C debug_assertions=yes -C opt-level=3
-
-use std::panic;
-
-fn main() {
-    let n = usize::MAX as u64;
-    assert_eq!((0..).by_ref().position(|i| i >= n), Some(usize::MAX));
-
-    let r = panic::catch_unwind(|| {
-        (0..).by_ref().position(|i| i > n)
-    });
-    assert!(r.is_err());
-
-    let r = panic::catch_unwind(|| {
-        (0..=n + 1).by_ref().position(|_| false)
-    });
-    assert!(r.is_err());
-}