Splice remove suggesion hints when those are cleared in the editor. (#9088)

Closes https://github.com/zed-industries/zed/issues/6793

Release Notes:

- Fixed copilot suggestions not disappearing after disabling the tool
([6793](https://github.com/zed-industries/zed/issues/6793))

crates/editor/src/inlay_hint_cache.rs

@@ -1255,7 +1255,7 @@ fn apply_hint_update(
         editor.inlay_hint_cache.version += 1;
     }
     if displayed_inlays_changed {
-        editor.splice_inlay_hints(to_remove, to_insert, cx)
+        editor.splice_inlays(to_remove, to_insert, cx)
     }
 }