test: adapt helm test not to use real image tags

[odubajDT]

No description provided.

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.2% Duplication

[codecov]

Codecov Report

Merging #2383 (bfb9124) into main (16a4a14) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2383   +/-   ##
=======================================
  Coverage   85.50%   85.50%           
=======================================
  Files         161      161           
  Lines       10166    10166           
=======================================
  Hits         8692     8692           
  Misses       1196     1196           
  Partials      278      278           

Flag	Coverage Δ
certificate-operator	67.43% <ø> (ø)
component-tests	57.35% <ø> (ø)
lifecycle-operator	85.61% <ø> (ø)
metrics-operator	87.58% <ø> (ø)
scheduler	32.12% <ø> (ø)

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