fix uninlined_format_args clippy warnings (#16452)

I noticed some clippy errors while running clippy under 1.88.
```
error: variables can be used directly in the `format!` string
   --> src/config_files.rs:204:25
    |
204 |                         warn!("AutoLoading: {:?}", path);
    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args
    = note: `-D clippy::uninlined-format-args` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(clippy::uninlined_format_args)]`
```
And this pr is going to fix this.

## Release notes summary - What our users need to know
NaN

## Tasks after submitting
NaN

crates/nu-cli/src/eval_file.rs

@@ -82,7 +82,7 @@ pub fn evaluate_file(
         .expect("internal error: missing filename");
 
     let mut working_set = StateWorkingSet::new(engine_state);
-    trace!("parsing file: {}", file_path_str);
+    trace!("parsing file: {file_path_str}");
     let block = parse(&mut working_set, Some(file_path_str), &file, false);
 
     if let Some(warning) = working_set.parse_warnings.first() {

crates/nu-cli/src/repl.rs

@@ -450,7 +450,7 @@ fn loop_iteration(ctx: LoopContext) -> (bool, Stack, Reedline) {
         start_time = std::time::Instant::now();
         if history.sync_on_enter {
             if let Err(e) = line_editor.sync_history() {
-                warn!("Failed to sync history: {}", e);
+                warn!("Failed to sync history: {e}");
             }
         }
 
@@ -934,7 +934,7 @@ fn do_run_cmd(
     entry_num: usize,
     use_color: bool,
 ) -> Reedline {
-    trace!("eval source: {}", s);
+    trace!("eval source: {s}");
 
     let mut cmds = s.split_whitespace();
 

crates/nu-cli/src/syntax_highlight.rs

@@ -38,7 +38,7 @@ pub(crate) fn highlight_syntax(
     line: &str,
     cursor: usize,
 ) -> HighlightResult {
-    trace!("highlighting: {}", line);
+    trace!("highlighting: {line}");
 
     let config = stack.get_config(engine_state);
     let highlight_resolved_externals = config.highlight_resolved_externals;