operator/pkg/tasks/init: unit test karmada resource

[mohamedawnallah]

Description

In this commit, we unit test karmada resource init task on running karmada resources, system namespaces, crds, webhook configurations, and api service.

What type of PR is this?

Which issue(s) this PR fixes: Part of #5491.

Does this PR introduce a user-facing change?:

NONE

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Codecov Report

Attention: Patch coverage is 16.66667% with 15 lines in your changes missing coverage. Please review.

Project coverage is 38.72%. Comparing base (0d55ead) to head (6630227).

Files with missing lines	Patch %	Lines
operator/pkg/tasks/init/karmadaresource.go	18.18%	9 Missing :warning:
operator/pkg/util/util.go	0.00%	3 Missing :warning:
operator/pkg/util/apiclient/idempotency.go	0.00%	2 Missing :warning:
operator/pkg/util/apiclient/wait.go	50.00%	1 Missing :warning:

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5701      +/-   ##
==========================================
- Coverage   39.09%   38.72%   -0.38%     
==========================================
  Files         650      650              
  Lines       45209    55132    +9923     
==========================================
+ Hits        17676    21350    +3674     
- Misses      26180    32413    +6233     
- Partials     1353     1369      +16     

Flag	Coverage Δ
unittests	38.72% <16.66%> (-0.38%)	:arrow_down:

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[mohamedawnallah]

cc @XiShanYongYe-Chang All unit test cases & linting issues passed after rebasing on the master branch :)