SNOW-676736: get file results in change of file permissions does not inherit parent folder permission

[sfc-gh-aling]

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.

   Fixes #SNOW-676736

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.

mkstemp creates a temporary file in the most secure manner possible -- which is only given permission to the current user, not to group or other which is not expected.

change to use open which will inherit the default file permission.

[codecov-commenter]

Codecov Report

Merging #1338 (84ca942) into main (d016d81) will decrease coverage by 0.13%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1338      +/-   ##
==========================================
- Coverage   82.32%   82.19%   -0.14%     
==========================================
  Files          60       60              
  Lines        8421     8424       +3     
  Branches     1247     1248       +1     
==========================================
- Hits         6933     6924       -9     
- Misses       1179     1189      +10     
- Partials      309      311       +2     

Impacted Files	Coverage Δ
src/snowflake/connector/encryption_util.py	99.10% <100.00%> (+0.02%)	⬆️
src/snowflake/connector/ocsp_snowflake.py	76.24% <0.00%> (-1.49%)	⬇️
src/snowflake/connector/errors.py	89.78% <0.00%> (-0.54%)	⬇️

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[sfc-gh-mkeller]

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