[YUNIKORN-3229] Update go version to 1.26

[adityadtu5]

What is this PR for?

• Updated go version to 1.26
• Updated golangci_lint to 2.10.1
• Fixed linting warnigns

What type of PR is it?

• - Bug Fix
• - Improvement
• - Feature
• - Documentation
• - Hot Fix
• - Refactoring

Todos

• - Task

What is the Jira issue?

https://issues.apache.org/jira/browse/YUNIKORN-3229

How should this be tested?

• run make e2e_tests locally

Screenshots (if appropriate)

Questions:

• - The licenses files need update.
• - There is breaking changes for older versions.
• - It needs documentation.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.08%. Comparing base (4366bba) to head (759c216).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1003      +/-   ##
==========================================
- Coverage   66.14%   66.08%   -0.07%     
==========================================
  Files          72       72              
  Lines        7713     7713              
==========================================
- Hits         5102     5097       -5     
- Misses       2398     2402       +4     
- Partials      213      214       +1     

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[wilfred-s]

LGTM