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, 35 insertions, 0 deletions

diff --git a/tests/ui/enum/enum-size-variance.rs b/tests/ui/enum/enum-size-variance.rs
new file mode 100644
index 00000000000..082bd0dcfb2
--- /dev/null
+++ b/tests/ui/enum/enum-size-variance.rs
@@ -0,0 +1,35 @@
+// run-pass
+
+#![warn(variant_size_differences)]
+#![allow(dead_code)]
+
+// Note that the following test works because all fields of the enum variants are of the same size.
+// If this test is modified and the reordering logic in librustc/ty/layout.rs kicks in, it fails.
+
+enum Enum1 { }
+
+enum Enum2 { A, B, C }
+
+enum Enum3 { D(i64), E, F }
+
+enum Enum4 { H(i64), I(i64), J }
+
+enum Enum5 {
+    L(i64, i64, i64, i64), //~ WARNING three times larger
+    M(i64),
+    N
+}
+
+enum Enum6<T, U> {
+    O(T),
+    P(U),
+    Q(i64)
+}
+
+#[allow(variant_size_differences)]
+enum Enum7 {
+    R(i64, i64, i64, i64),
+    S(i64),
+    T
+}
+pub fn main() { }