Update go version 1.21

[sanketsudake]

Description

Which issue(s) this PR fixes:

Fixes #

Testing

Checklist:

• I ran tests as well as code linting locally to verify my changes.
• I have done manual verification of my changes, changes working as expected.
• I have added new tests to cover my changes.
• My changes follow contributing guidelines of Fission.
• I have signed all of my commits.

[codecov]

Codecov Report

Merging #2833 (9ed5659) into main (1cbc0ba) will increase coverage by 0.02%.
Report is 2 commits behind head on main.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2833      +/-   ##
==========================================
+ Coverage   20.84%   20.87%   +0.02%     
==========================================
  Files          68       68              
  Lines        7344     7344              
==========================================
+ Hits         1531     1533       +2     
+ Misses       5699     5697       -2     
  Partials      114      114              

Flag	Coverage Δ
unittests	20.87% <ø> (+0.02%)	⬆️

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