Use count_documents() to count mongo documents instead of old and deprecated count()

[baonq-me]

Use count_documents() to count Mongo documents instead of old and deprecated count()

    **adminInfo(),
  File "/Users/quocbao/cve-search/web/home/utils.py", line 297, in adminInfo
    return {"stats": getDBStats(True), "updateOutput": filterUpdateField(output)}
  File "/Users/quocbao/cve-search/lib/DatabaseLayer.py", line 457, in getDBStats
    "size": getSize(key.lower()),
  File "/Users/quocbao/cve-search/lib/DatabaseLayer.py", line 445, in getSize
    return db[collection].count()
  File "/Users/quocbao/cve-search/venv/lib/python3.10/site-packages/pymongo/collection.py", line 3509, in __call__
    raise TypeError(
TypeError: 'Collection' object is not callable. If you meant to call the 'count' method on a 'Collection' object it is failing because no such method exists.
2023-12-11 14:40:33,404 - werkzeug - INFO     - 127.0.0.1 - - [11/Dec/2023 14:40:33] "GET /admin/ HTTP/1.1" 500 -

Since commit 8d4c6d4 pymongo 4.5.0 have some breaking changes, for example they removed method. From version 4.0 they remove many methods including count()
https://pymongo.readthedocs.io/en/stable/changelog.html

Removed pymongo.collection.Collection.count().

[P-T-I]

Thank you!