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, 22 deletions

diff --git a/src/test/rustdoc-ui/coverage/enums.rs b/src/test/rustdoc-ui/coverage/enums.rs
deleted file mode 100644
index a4ae36d6837..00000000000
--- a/src/test/rustdoc-ui/coverage/enums.rs
+++ /dev/null
@@ -1,22 +0,0 @@
-// compile-flags:-Z unstable-options --show-coverage
-// check-pass
-
-//! (remember the crate root is still a module)
-
-/// so check out this enum here
-pub enum ThisEnum {
-    /// this variant has some weird stuff going on
-    VarOne {
-        /// like, it has some named fields inside
-        field_one: usize,
-        // (these show up as struct fields)
-        field_two: usize,
-    },
-    /// here's another variant for you
-    VarTwo(String),
-    // but not all of them need to be documented as thoroughly
-    VarThree,
-}
-
-/// uninhabited enums? sure, let's throw one of those around
-pub enum OtherEnum {}