operator/pkg/tasks/init: unit test namespace

[mohamedawnallah]

Description

In this commit, we unit test the namespace init task in the operator package making sure namespace is created successfully.

What type of PR is this?

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

Dependency This PR depends on #5630.

Does this PR introduce a user-facing change?:

NONE

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 39.12%. Comparing base (0d55ead) to head (5598567).

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5635      +/-   ##
==========================================
+ Coverage   39.09%   39.12%   +0.02%     
==========================================
  Files         650      650              
  Lines       45209    45209              
==========================================
+ Hits        17676    17689      +13     
+ Misses      26180    26164      -16     
- Partials     1353     1356       +3     

Flag	Coverage Δ
unittests	39.12% <ø> (+0.02%)	:arrow_up:

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[mohamedawnallah]

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