Fix document colors issues with other inlays and multi buffers (#33598)

Closes https://github.com/zed-industries/zed/issues/33575

* Fixes inlay colors spoiled after document color displayed
* Optimizes the query pattern for large multi buffers

Release Notes:

- Fixed document colors issues with other inlays and multi buffers

crates/editor/src/display_map/inlay_map.rs

@@ -327,9 +327,9 @@ impl<'a> Iterator for InlayChunks<'a> {
                     InlayId::DebuggerValue(_) => self.highlight_styles.inlay_hint,
                     InlayId::Color(_) => match inlay.color {
                         Some(color) => {
-                            let style = self.highlight_styles.inlay_hint.get_or_insert_default();
+                            let mut style = self.highlight_styles.inlay_hint.unwrap_or_default();
                             style.color = Some(color);
-                            Some(*style)
+                            Some(style)
                         }
                         None => self.highlight_styles.inlay_hint,
                     },