chore(upgrade golang): Upgrade golang for CVE fixes.

[meet2mky]

Description

Upgrade golang for CVE fixes.

Link to the issue in case of a bug fix.

Testing details

1. Manual - NA
2. Unit tests - NA
3. Integration tests - NA

Any backward incompatible change? If so, please explain.

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the Go language version used throughout the project to 1.26.1. This essential upgrade is primarily driven by the need to incorporate critical security fixes for various CVEs, ensuring the application remains robust and secure against known vulnerabilities. The change impacts Dockerfiles, Go module definitions, and several build and test scripts that explicitly download and install Go.

Highlights

• Go Version Upgrade: The Go programming language version has been upgraded from 1.23.0 to 1.26.1 across the project's build and test environments.
• Security Fixes: This upgrade specifically addresses known Common Vulnerabilities and Exposures (CVEs) present in older Go versions, enhancing the project's security posture.

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[gemini-code-assist]

Code Review

This pull request correctly upgrades the Go version to 1.26.1 to address CVEs. My feedback focuses on improving maintainability. In several shell scripts and Dockerfiles, the Go version is hardcoded. I've suggested using variables (GO_VERSION) in shell scripts and ARG in Dockerfiles to centralize the version number. This will make future upgrades much easier. The changes themselves are correct.

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (v2.5.3_patch_release@498e8d2). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
internal/logger/logger.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                   Coverage Diff                   @@
##             v2.5.3_patch_release    #4505   +/-   ##
=======================================================
  Coverage                        ?   78.89%           
=======================================================
  Files                           ?      106           
  Lines                           ?    11696           
  Branches                        ?        0           
=======================================================
  Hits                            ?     9228           
  Misses                          ?     1991           
  Partials                        ?      477           

Flag	Coverage Δ
unittests	78.89% <75.00%> (?)

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