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 !

3 files changed, 4 insertions, 4 deletions

diff --git a/compiler/rustc_trait_selection/src/traits/coherence.rs b/compiler/rustc_trait_selection/src/traits/coherence.rs
index 26757965c95..258d2e2d28c 100644
--- a/compiler/rustc_trait_selection/src/traits/coherence.rs
+++ b/compiler/rustc_trait_selection/src/traits/coherence.rs
@@ -749,7 +749,7 @@ impl<'tcx> TypeVisitor<'tcx> for OrphanChecker<'tcx> {
     ///
     /// This means that we can completely ignore constants during the orphan check.
     ///
-    /// See `src/test/ui/coherence/const-generics-orphan-check-ok.rs` for examples.
+    /// See `tests/ui/coherence/const-generics-orphan-check-ok.rs` for examples.
     ///
     /// [^1]: This might not hold for function pointers or trait objects in the future.
     /// As these should be quite rare as const arguments and especially rare as impl
diff --git a/compiler/rustc_trait_selection/src/traits/project.rs b/compiler/rustc_trait_selection/src/traits/project.rs
index f7614997585..81966f3fcb2 100644
--- a/compiler/rustc_trait_selection/src/traits/project.rs
+++ b/compiler/rustc_trait_selection/src/traits/project.rs
@@ -282,7 +282,7 @@ fn project_and_unify_type<'cx, 'tcx>(
     };
     debug!(?normalized, ?obligations, "project_and_unify_type result");
     let actual = obligation.predicate.term;
-    // For an example where this is necessary see src/test/ui/impl-trait/nested-return-type2.rs
+    // For an example where this is necessary see tests/ui/impl-trait/nested-return-type2.rs
     // This allows users to omit re-mentioning all bounds on an associated type and just use an
     // `impl Trait` for the assoc type to add more bounds.
     let InferOk { value: actual, obligations: new } =
diff --git a/compiler/rustc_trait_selection/src/traits/wf.rs b/compiler/rustc_trait_selection/src/traits/wf.rs
index 0e0a883d9f5..fec4047ff49 100644
--- a/compiler/rustc_trait_selection/src/traits/wf.rs
+++ b/compiler/rustc_trait_selection/src/traits/wf.rs
@@ -232,7 +232,7 @@ fn extend_cause_with_original_assoc_item_obligation<'tcx>(
             // The obligation comes not from the current `impl` nor the `trait` being implemented,
             // but rather from a "second order" obligation, where an associated type has a
             // projection coming from another associated type. See
-            // `src/test/ui/associated-types/point-at-type-on-obligation-failure.rs` and
+            // `tests/ui/associated-types/point-at-type-on-obligation-failure.rs` and
             // `traits-assoc-type-in-supertrait-bad.rs`.
             if let Some(ty::Alias(ty::Projection, projection_ty)) = proj.term.ty().map(|ty| ty.kind())
                 && let Some(&impl_item_id) =
@@ -640,7 +640,7 @@ impl<'tcx> WfPredicates<'tcx> {
                     // hidden type that is not actually well formed and
                     // can cause compiler crashes when the user abuses unsafe
                     // code to procure such a closure.
-                    // See src/test/ui/type-alias-impl-trait/wf_check_closures.rs
+                    // See tests/ui/type-alias-impl-trait/wf_check_closures.rs
                     let obligations = self.nominal_obligations(did, substs);
                     self.out.extend(obligations);
                 }