* Fixed connections pool leak on failed ydb.Open call

[asmyasnikov]

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Issue Number: #1433

What is the new behavior?

Other information

[github-actions]

summary

Base version: v3.80.4 (master)
Suggested version: v3.80.5

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.94%. Comparing base (a827ded) to head (a4da503).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1464      +/-   ##
==========================================
- Coverage   67.95%   67.94%   -0.02%     
==========================================
  Files         350      350              
  Lines       36288    36289       +1     
==========================================
- Hits        24660    24655       -5     
- Misses      10551    10556       +5     
- Partials     1077     1078       +1     

Flag	Coverage Δ
experiment	72.08% <100.00%> (-0.10%)	⬇️
go-1.21.x	68.14% <100.00%> (-0.03%)	⬇️
go-1.22.x	65.68% <100.00%> (-0.12%)	⬇️
go-1.23.x	67.82% <100.00%> (-0.10%)	⬇️
integration	53.91% <100.00%> (-0.06%)	⬇️
macOS	40.97% <0.00%> (-0.02%)	⬇️
ubuntu	72.36% <100.00%> (-0.02%)	⬇️
unit	41.41% <0.00%> (-0.02%)	⬇️
windows	41.40% <0.00%> (-0.01%)	⬇️
ydb-23.3	47.56% <100.00%> (-0.23%)	⬇️
ydb-24.1	53.84% <100.00%> (+0.04%)	⬆️
ydb-nightly	72.08% <100.00%> (-0.10%)	⬇️

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