Revert "file_finder: Remove common segments of long paths in search results (#25049)" (#25163)

This reverts commit 9ef0501853 due to a
panic.

```
{
  "thread": "main",
  "payload": "9 is not a valid char boundary in path \"crates/…/LiveKitBridge/\"",
  "location_data": {
    "file": "crates/file_finder/src/file_finder.rs",
    "line": 646
  }
}
```

Release Notes:

- N/A

crates/assistant_context_editor/src/context.rs

@@ -650,6 +650,7 @@ impl AssistantContext {
         )
     }
 
+    #[allow(clippy::too_many_arguments)]
     pub fn new(
         id: ContextId,
         replica_id: ReplicaId,
@@ -770,6 +771,7 @@ impl AssistantContext {
         }
     }
 
+    #[allow(clippy::too_many_arguments)]
     pub fn deserialize(
         saved_context: SavedContext,
         path: PathBuf,