ci: run tests with --race enabled

[mozillazg]

What this PR does / why we need it:

Which issue(s) this PR fixes (optional, using fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when the PR gets merged):
Fixes #1929

Special notes for your reviewer:

Depend on #1941 #1942 #1943

[codecov-commenter]

Codecov Report

Merging #1944 (721d4ef) into master (c88d1ab) will increase coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1944      +/-   ##
==========================================
+ Coverage   54.22%   54.30%   +0.08%     
==========================================
  Files         106      106              
  Lines        9441     9441              
==========================================
+ Hits         5119     5127       +8     
+ Misses       3933     3927       -6     
+ Partials      389      387       -2     

Flag	Coverage Δ
unittests	54.30% <ø> (+0.08%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...onstrainttemplate/constrainttemplate_controller.go	57.07% <0.00%> (+0.23%)	⬆️
pkg/readiness/object_tracker.go	83.98% <0.00%> (+1.06%)	⬆️
pkg/readiness/list.go	91.17% <0.00%> (+11.76%)	⬆️

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[mozillazg]

Ready for review.

[sozercan]

Thank you! LGTM

[maxsmythe]

LGTM

[willbeason]

Nice! Glad we've fixed the race conditions!