Fix upload xlsx files (#12306)

Author: ea-rus

mindsdb/integrations/utilities/files/file_reader.py

@@ -121,6 +121,10 @@ def __init__(
 
         self.parameters = {}
 
+    def close(self):
+        if self.file_obj is not None:
+            self.file_obj.close()
+
     def get_format(self) -> str:
         if self.format is not None:
             return self.format

mindsdb/interfaces/file/file_controller.py

@@ -169,6 +169,7 @@ def get_file_pages(self, source_path: str):
         """
         file_reader = FileReader(path=source_path)
         tables = file_reader.get_contents()
+        file_reader.close()
 
         pages_files = {}
         pages_index = {}