fixed flaky tests

[size12]

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Pull request type

Fixed flaky tests which use xtest.SpinWaitCondition

Please check the type of change your PR introduces:

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

What is the current behavior?

Sometimes tests using xtest.SpinWaitCondition fails.

Issue Number: #996 #741

It looks like that jobs' server performance degrades sometimes, which causes failed tests. I think, that using greater timeout value will help in such cases.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (c6e45cd) 68.48% compared to head (47b6cdf) 68.40%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1029      +/-   ##
==========================================
- Coverage   68.48%   68.40%   -0.09%     
==========================================
  Files         252      252              
  Lines       25155    25155              
==========================================
- Hits        17228    17207      -21     
- Misses       7069     7086      +17     
- Partials      858      862       +4     

Flag	Coverage Δ
	55.11% <ø> (-0.08%)	:arrow_down:
go-1.20.x	68.28% <ø> (+<0.01%)	:arrow_up:
go-1.21.x	68.37% <ø> (-0.09%)	:arrow_down:
integration	55.11% <ø> (-0.08%)	:arrow_down:
macOS	38.67% <ø> (+0.01%)	:arrow_up:
ubuntu	38.68% <ø> (ø)
unit	38.74% <ø> (+<0.01%)	:arrow_up:
windows	38.69% <ø> (-0.03%)	:arrow_down:
ydb-22.5	54.59% <ø> (-0.24%)	:arrow_down:
ydb-23.1	54.97% <ø> (+0.03%)	:arrow_up:
ydb-23.2	54.77% <ø> (-0.04%)	:arrow_down:
ydb-23.3	54.70% <ø> (-0.29%)	:arrow_down:

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