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-db/src/assists.rs

@@ -88,7 +88,7 @@ impl FromStr for AssistKind {
             "RefactorExtract" => Ok(AssistKind::RefactorExtract),
             "RefactorInline" => Ok(AssistKind::RefactorInline),
             "RefactorRewrite" => Ok(AssistKind::RefactorRewrite),
-            unknown => Err(format!("Unknown AssistKind: '{}'", unknown)),
+            unknown => Err(format!("Unknown AssistKind: '{unknown}'")),
         }
     }
 }