Inline all format arguments where possible

This makes code more readale and concise,
moving all format arguments like `format!("{}", foo)`
into the more compact `format!("{foo}")` form.

The change was automatically created with, so there are far less change
of an accidental typo.

```
cargo clippy --fix -- -A clippy::all -W clippy::uninlined_format_args
```

crates/ide-completion/src/context/tests.rs

@@ -19,7 +19,7 @@ fn check_expected_type_and_name(ra_fixture: &str, expect: Expect) {
     let name =
         completion_context.expected_name.map_or_else(|| "?".to_owned(), |name| name.to_string());
 
-    expect.assert_eq(&format!("ty: {}, name: {}", ty, name));
+    expect.assert_eq(&format!("ty: {ty}, name: {name}"));
 }
 
 #[test]