Revert "SNOW-984600 Avoid closing expired sessions synchronously with…

[sfc-gh-knozderko]

… obtained lock (#830)"

This reverts commit 645659a.

Description

Temporary reverted to release hotfix from master.

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: 3 lines in your changes are missing coverage. Please review.

Comparison is base (49cb77d) 83.45% compared to head (8f35e5d) 83.48%.

Files	Patch %	Lines
Snowflake.Data/Core/Session/SFSession.cs	33.33%	0 Missing and 2 partials ⚠️
Snowflake.Data/Core/Session/SessionPool.cs	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #835      +/-   ##
==========================================
+ Coverage   83.45%   83.48%   +0.03%     
==========================================
  Files          89       89              
  Lines        9189     9188       -1     
  Branches      841      841              
==========================================
+ Hits         7669     7671       +2     
+ Misses       1287     1285       -2     
+ Partials      233      232       -1     

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