Node hinting slo

[qrort]

Integration tests for ydb.WithPreferredNodeID functionality against a multinode cluster.

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):

[github-actions]

summary

Inferred base version: v3.121.0
Suggested version: v3.121.1

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.86%. Comparing base (fbf3502) to head (89fb2e2).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1972      +/-   ##
==========================================
- Coverage   73.98%   73.86%   -0.12%     
==========================================
  Files         392      392              
  Lines       34417    34417              
==========================================
- Hits        25462    25422      -40     
- Misses       7834     7863      +29     
- Partials     1121     1132      +11     

Flag	Coverage Δ
experiment	73.55% <ø> (-0.08%)	⬇️
go-1.21.x	72.57% <ø> (-0.14%)	⬇️
go-1.25.x	73.85% <ø> (-0.10%)	⬇️
integration	54.87% <ø> (-0.43%)	⬇️
macOS	47.24% <ø> (-0.02%)	⬇️
ubuntu	73.86% <ø> (-0.12%)	⬇️
unit	47.25% <ø> (-0.03%)	⬇️
windows	47.22% <ø> (-0.05%)	⬇️
ydb-24.4	54.03% <ø> (-0.52%)	⬇️
ydb-25.2	54.79% <ø> (-0.18%)	⬇️
ydb-latest	54.45% <ø> (-0.17%)	⬇️
ydb-nightly	73.55% <ø> (-0.08%)	⬇️

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