Use into_owned over to_string for Cow<str> (#39024)

This removes unnecessary allocations when the `Cow` is already owned


Release Notes:

- N/A *or* Added/Fixed/Improved ...

crates/vim/src/normal.rs

@@ -858,9 +858,9 @@ impl Vim {
             let filename = if let Some(file) = buffer.read(cx).file() {
                 if count.is_some() {
                     if let Some(local) = file.as_local() {
-                        local.abs_path(cx).to_string_lossy().to_string()
+                        local.abs_path(cx).to_string_lossy().into_owned()
                     } else {
-                        file.full_path(cx).to_string_lossy().to_string()
+                        file.full_path(cx).to_string_lossy().into_owned()
                     }
                 } else {
                     file.path().display(file.path_style(cx)).into_owned()

crates/vim/src/state.rs

@@ -1610,7 +1610,7 @@ impl PickerDelegate for MarksViewDelegate {
 
         let (right_output, right_runs): (String, Vec<_>) = match &mark_match.info {
             MarksMatchInfo::Path(path) => {
-                let s = path.to_string_lossy().to_string();
+                let s = path.to_string_lossy().into_owned();
                 (
                     s.clone(),
                     vec![(0..s.len(), HighlightStyle::color(cx.theme().colors().text))],