[fix] SQLiteIndexedTar: Also call close on deletion

This avoids the error when running rapidgzip threads are detected.
And, in the case of fsspec.open, the context manager cannot be
reasonably used for SQLiteIndexedTar.

core/ratarmountcore/SQLiteIndexedTar.py

@@ -890,15 +890,22 @@ def _detectGnuIncremental(self, fileObject: Any) -> bool:
 
         return False
 
+    def close(self):
+        if hasattr(self, "tarFileObject") and self.tarFileObject:
+            self.tarFileObject.close()
+
+        if getattr(self, "isFileObject", False) and hasattr(self, "rawFileObject") and self.rawFileObject:
+            self.rawFileObject.close()
+
     @overrides(MountSource)
     def __exit__(self, exception_type, exception_value, exception_traceback):
+        self.close()
         super().__exit__(exception_type, exception_value, exception_traceback)
 
-        if self.tarFileObject:
-            self.tarFileObject.close()
-
-        if not self.isFileObject and self.rawFileObject:
-            self.rawFileObject.close()
+    def __del__(self):
+        self.close()
+        if hasattr(super(), '__del__'):
+            super().__del__()
 
     def _getArchivePath(self) -> Optional[str]:
         return None if self.tarFileName == '<file object>' else self.tarFileName