update github actions to use go1.21

[msherif1234]

Description

update Github actions to use go1.21

make sure to set GOTOOLCHAIN to local to avoid updating go.mod
by setting this envvar
go env -w GOTOOLCHAIN="local"

Dependencies

n/a

Checklist

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[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (6339a10) 31.71% compared to head (fa84b01) 31.71%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #213   +/-   ##
=======================================
  Coverage   31.71%   31.71%           
=======================================
  Files          37       37           
  Lines        3371     3371           
=======================================
  Hits         1069     1069           
  Misses       2239     2239           
  Partials       63       63           

Flag	Coverage Δ
unittests	31.71% <ø> (ø)

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[jotak]

here it should be the minimum allowed, hence 1.20

[jotak]

/lgtm

[msherif1234]

/approve

[openshift-ci]

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