Fix: terminate onnx inference session manually (#10076)

### What problem does this PR solve?

terminate onnx inference session and release memory manually.

Issue #5050 
Issue #9992 
Issue #8805

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

deepdoc/vision/recognizer.py

@@ -13,7 +13,7 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 #
-
+import gc
 import logging
 import os
 import math
@@ -406,6 +406,11 @@ class Recognizer:
             "score": float(scores[i])
         } for i in indices]
 
+    def close(self):
+        logging.info("Close recognizer.")
+        del self.ort_sess
+        gc.collect()
+
     def __call__(self, image_list, thr=0.7, batch_size=16):
         res = []
         images = []
@@ -430,5 +435,7 @@ class Recognizer:
 
         return res
 
+    def __del__(self):
+        self.close()