ci: use Go 1.25.7 (#6739)

[ti-chi-bot]

This is an automated cherry-pick of #6739

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 57.47%. Comparing base (c23a794) to head (11174e1).
⚠️ Report is 82 commits behind head on release-1.6.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-1.6    #6740      +/-   ##
===============================================
+ Coverage        57.20%   57.47%   +0.27%     
===============================================
  Files              259      263       +4     
  Lines            33233    38186    +4953     
===============================================
+ Hits             19010    21947    +2937     
- Misses           12290    14169    +1879     
- Partials          1933     2070     +137     

Flag	Coverage Δ
unittest	57.47% <ø> (+0.27%)	⬆️

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please ask for approval from csuzhangxc. For more information see the Code Review Process.
Please ensure that each of them provides their approval before proceeding.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[ti-chi-bot]

@ti-chi-bot: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-e2e-kind-across-kubernetes	11174e1	link	false	/test pull-e2e-kind-across-kubernetes
pull-e2e-kind-basic	11174e1	link	false	/test pull-e2e-kind-basic
pull-e2e-kind-dmcluster	11174e1	link	false	/test pull-e2e-kind-dmcluster
pull-e2e-kind-serial	11174e1	link	false	/test pull-e2e-kind-serial
pull-e2e-kind-tngm	11174e1	link	false	/test pull-e2e-kind-tngm
pull-e2e-kind-tidbcluster	11174e1	link	false	/test pull-e2e-kind-tidbcluster
pull-e2e-kind-scale-simultaneously	11174e1	link	false	/test pull-e2e-kind-scale-simultaneously
pull-e2e-kind-br	11174e1	link	false	/test pull-e2e-kind-br

Full PR test history. Your PR dashboard.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.