Update GoLang to 1.26

[chethanv28]

What this PR does / why we need it:
Update GoLang to 1.26 to address CVE-2025-68121 (https://nvd.nist.gov/vuln/detail/cve-2025-68121)

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #3923

Testing done:
TBA

Special notes for your reviewer:

Release note:

Update GoLang to 1.26

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