SNOW-1739483 Fix S3 exception casting and flaky tests

[sfc-gh-dstempniak]

Description

Fix S3 exception casting and flaky tests
We sometimes get System.InvalidCastException : Unable to cast object of type 'System.Net.Sockets.SocketException' to type 'Amazon.S3.AmazonS3Exception'.

Checklist

• Code compiles correctly
• Code is formatted according to Coding Conventions
• Created tests which fail without the change (if possible)
• All tests passing (dotnet test)
• Extended the README / documentation, if necessary
• Provide JIRA issue id (if possible) or GitHub issue id in PR name

[codecov]

Codecov Report

Attention: Patch coverage is 92.06349% with 5 lines in your changes missing coverage. Please review.

Project coverage is 86.03%. Comparing base (9ae5119) to head (deceee4).

Files with missing lines	Patch %	Lines
Snowflake.Data/Core/HttpUtil.cs	81.25%	2 Missing and 1 partial ⚠️
...Data/Core/FileTransfer/StorageClient/SFS3Client.cs	95.74%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1042      +/-   ##
==========================================
- Coverage   86.05%   86.03%   -0.03%     
==========================================
  Files         118      118              
  Lines       11493    11512      +19     
  Branches     1152     1157       +5     
==========================================
+ Hits         9890     9904      +14     
- Misses       1325     1327       +2     
- Partials      278      281       +3     

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