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/imports/import_assets.rs

@@ -367,7 +367,7 @@ fn import_for_item(
     let expected_import_end = if item_as_assoc(db, original_item).is_some() {
         unresolved_qualifier.to_string()
     } else {
-        format!("{}::{}", unresolved_qualifier, item_name(db, original_item)?)
+        format!("{unresolved_qualifier}::{}", item_name(db, original_item)?)
     };
     if !import_path_string.contains(unresolved_first_segment)
         || !import_path_string.ends_with(&expected_import_end)

crates/ide-db/src/imports/insert_use/tests.rs

@@ -1014,7 +1014,7 @@ fn check_with_config(
         .and_then(|it| ImportScope::find_insert_use_container(&it, sema))
         .or_else(|| ImportScope::from(syntax))
         .unwrap();
-    let path = ast::SourceFile::parse(&format!("use {};", path))
+    let path = ast::SourceFile::parse(&format!("use {path};"))
         .tree()
         .syntax()
         .descendants()