xtest.Context uses testing.TB.Context() as root context

[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: N/A

What is the new behavior?

Other information

[github-actions]

summary

Inferred base version: v3.127.6
Suggested version: v3.127.7

[Copilot]

Pull request overview

Updates pkg/xtest.Context() to derive its root context from testing.TB.Context() (intended for Go 1.24+), so test cancellation/deadlines can propagate naturally into contexts created by xtest.

Changes:

• Switch xtest.Context(t) to use a contextRoot(t) helper as the parent context.
• Add Go-version-gated contextRoot(t) implementations via build tags (go1.24 / !go1.24).

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
pkg/xtest/context.go	Uses contextRoot(t) instead of context.Background() when building the test context.
pkg/xtest/context_root_go1.24.go	Adds contextRoot(t) implementation for Go 1.24 builds.
pkg/xtest/context_root.go	Adds contextRoot(t) implementation for non-Go-1.24 builds.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.25%. Comparing base (5cd2f64) to head (279ea80).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2046      +/-   ##
==========================================
- Coverage   74.30%   73.25%   -1.05%     
==========================================
  Files         399      400       +1     
  Lines       35003    35005       +2     
==========================================
- Hits        26008    25642     -366     
- Misses       7867     8220     +353     
- Partials     1128     1143      +15     

Flag	Coverage Δ
experiment	?
go-1.21.x	73.18% <100.00%> (-0.05%)	⬇️
go-1.25.x	56.03% <100.00%> (-18.23%)	⬇️
integration	56.10% <100.00%> (+0.33%)	⬆️
macOS	47.73% <0.00%> (-0.07%)	⬇️
ubuntu	73.25% <100.00%> (-1.05%)	⬇️
unit	47.76% <0.00%> (-0.06%)	⬇️
windows	47.75% <0.00%> (-0.05%)	⬇️
ydb-24.4	55.13% <100.00%> (-0.09%)	⬇️
ydb-25.2	56.01% <100.00%> (+0.32%)	⬆️
ydb-latest	55.86% <100.00%> (+0.36%)	⬆️
ydb-nightly	?

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