refactor(rust): Workaround for rust-analyzer bug (#19134)

crates/polars-pipe/src/executors/sinks/group_by/primitive/mod.rs

@@ -458,10 +458,11 @@ where
     fn finalize(&mut self, _context: &PExecutionContext) -> PolarsResult<FinalizedSink> {
         let dfs = self.pre_finalize()?;
         let payload = if self.ooc_state.ooc {
-            let mut iot = self.ooc_state.io_thread.lock().unwrap();
-            // make sure that we reset the shared states
-            // the OOC group_by will call split as well and it should
-            // not send continue spilling to disk
+            let mut guard = self.ooc_state.io_thread.lock().unwrap();
+            // Type hint fixes rust-analyzer thinking .take() is an iterator method.
+            let iot: &mut Option<_> = &mut *guard;
+            // Make sure that we reset the shared states. The OOC group_by will
+            // call split as well and it should not send continue spilling to disk.
             let iot = iot.take().unwrap();
             self.ooc_state.ooc = false;