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, 48 deletions

diff --git a/src/test/ui/write-fmt-errors.rs b/src/test/ui/write-fmt-errors.rs
deleted file mode 100644
index 3fcaefaa63e..00000000000
--- a/src/test/ui/write-fmt-errors.rs
+++ /dev/null
@@ -1,48 +0,0 @@
-// run-pass
-
-#![feature(io_error_uncategorized)]
-
-use std::fmt;
-use std::io::{self, Error, Write, sink};
-
-struct ErrorDisplay;
-
-impl fmt::Display for ErrorDisplay {
-    fn fmt(&self, _: &mut fmt::Formatter) -> fmt::Result {
-        Err(fmt::Error)
-    }
-}
-
-struct ErrorWriter;
-
-const FORMAT_ERROR: io::ErrorKind = io::ErrorKind::Uncategorized;
-const WRITER_ERROR: io::ErrorKind = io::ErrorKind::NotConnected;
-
-impl Write for ErrorWriter {
-    fn write(&mut self, _buf: &[u8]) -> io::Result<usize> {
-        Err(Error::new(WRITER_ERROR, "not connected"))
-    }
-
-    fn flush(&mut self) -> io::Result<()> { Ok(()) }
-}
-
-fn main() {
-    // Test that the error from the formatter is propagated.
-    let res = write!(sink(), "{} {} {}", 1, ErrorDisplay, "bar");
-    assert!(res.is_err(), "formatter error did not propagate");
-    assert_eq!(res.unwrap_err().kind(), FORMAT_ERROR);
-
-    // Test that an underlying error is propagated
-    let res = write!(ErrorWriter, "abc");
-    assert!(res.is_err(), "writer error did not propagate");
-
-    // Writer error
-    let res = write!(ErrorWriter, "abc {}", ErrorDisplay);
-    assert!(res.is_err(), "writer error did not propagate");
-    assert_eq!(res.unwrap_err().kind(), WRITER_ERROR);
-
-    // Formatter error
-    let res = write!(ErrorWriter, "{} abc", ErrorDisplay);
-    assert!(res.is_err(), "formatter error did not propagate");
-    assert_eq!(res.unwrap_err().kind(), FORMAT_ERROR);
-}