SNOW-752200 reverting incorrect type-hint changes

[sfc-gh-mkeller]

Please answer these questions before submitting your pull requests. Thanks!

1. What GitHub issue is this PR addressing? Make sure that there is an accompanying issue to your PR.

   SNOW-752200
   Fixes SNOW-752200: Invalide None values in fetchmany and fetchall introduced in 3.0.1 #1464

2. Fill out the following pre-review checklist:

   • I am adding a new automated test(s) to verify correctness of my new code
   • I am adding new logging messages
   • I am adding a new telemetry message
   • I am modifying authorization mechanisms
   • I am adding new credentials
   • I am modifying OCSP code
   • I am adding a new dependency

3. Please describe how your code solves the related issue.

   There's no testing for this, mypy isn't covering cursor.py yet. However; the old type-hints were manually written by me and I suspect it was overwritten by an automated tool in eee76d1.

[codecov-commenter]

Codecov Report

Merging #1465 (f153641) into main (ec95c56) will decrease coverage by 0.11%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1465      +/-   ##
==========================================
- Coverage   81.91%   81.81%   -0.11%     
==========================================
  Files          60       60              
  Lines        8599     8599              
  Branches     1271     1271              
==========================================
- Hits         7044     7035       -9     
- Misses       1225     1232       +7     
- Partials      330      332       +2     

Impacted Files	Coverage Δ
src/snowflake/connector/cursor.py	94.66% <100.00%> (ø)
src/snowflake/connector/ocsp_snowflake.py	76.65% <0.00%> (-1.08%)	⬇️
src/snowflake/connector/cache.py	87.62% <0.00%> (-0.34%)	⬇️

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[sfc-gh-stan]

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