[BugFix] Properly set imagePullPolicy and containerSecurityContext for EsIndexCleaner cronjob container

[michalschott]

Which problem is this PR solving?

• Resolves 2208

Short description of the changes

• properly adds imagePullPolicy to EsIndexCleaner container
• properly adds securityContext to EsIndexCleaner container
• added tests for above use cases

[iblancasa]

@rubenvp8510 can you enable the CI jobs?

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (6538461) 87.51% compared to head (348df97) 87.51%.

❗ Current head 348df97 differs from pull request most recent head 4ff9976. Consider uploading reports for the commit 4ff9976 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2224   +/-   ##
=======================================
  Coverage   87.51%   87.51%           
=======================================
  Files         100      100           
  Lines        6912     6914    +2     
=======================================
+ Hits         6049     6051    +2     
  Misses        658      658           
  Partials      205      205           

Impacted Files	Coverage Δ
pkg/cronjob/es_index_cleaner.go	84.61% <100.00%> (+0.34%)	⬆️

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[michalschott]

Correct me if I'm wrong, but I don't think the test failure is caused by this PR?

[frzifus]

@michalschott no I think you are right. The CI system needs some love. All the e2e test stuff is unfortunately a bit messy. Let me re-run the test.