* Allowed sql.LevelSerializable isolation level in read-write mode …

[asmyasnikov]

…in database/sql transactions

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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: N/A

What is the new behavior?

Other information

[github-actions]

summary

Base version: v3.54.0-rc0.0.20231025191723-4ae0dcb740ba (master)
Cannot suggest a release version.
Can only suggest a release version when compared against the most recent version of this major: v3.54.0-rc0.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4ae0dcb) 66.79% compared to head (da83f91) 66.85%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #882      +/-   ##
==========================================
+ Coverage   66.79%   66.85%   +0.06%     
==========================================
  Files         255      255              
  Lines       24240    24243       +3     
==========================================
+ Hits        16190    16208      +18     
+ Misses       7218     7207      -11     
+ Partials      832      828       -4     

Flag	Coverage Δ
	53.45% <100.00%> (+0.10%)	⬆️
go-1.17.x	65.41% <100.00%> (+0.11%)	⬆️
go-1.20.x	66.78% <100.00%> (+0.12%)	⬆️
go-1.21.x	66.72% <100.00%> (+0.09%)	⬆️
integration	53.45% <100.00%> (+0.10%)	⬆️
macOS	39.09% <100.00%> (+0.05%)	⬆️
ubuntu	39.07% <100.00%> (+0.01%)	⬆️
unit	39.17% <100.00%> (+0.03%)	⬆️
windows	39.12% <100.00%> (+<0.01%)	⬆️
ydb-22.5	53.22% <100.00%> (+0.04%)	⬆️
ydb-23.1	52.96% <100.00%> (-0.13%)	⬇️
ydb-23.2	52.93% <100.00%> (-0.04%)	⬇️
ydb-23.3	53.25% <100.00%> (+0.19%)	⬆️

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Files	Coverage Δ
internal/xsql/isolation/isolation.go	100.00% <100.00%> (ø)

... and 5 files with indirect coverage changes

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