chore: fix linter issues

[mowies]

Fixes #485

[codecov]

Codecov Report

Merging #488 (1382534) into main (1b3a56f) will decrease coverage by 0.11%.
The diff coverage is 72.80%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #488      +/-   ##
==========================================
- Coverage   59.43%   59.32%   -0.12%     
==========================================
  Files          28       28              
  Lines        2098     2198     +100     
==========================================
+ Hits         1247     1304      +57     
- Misses        746      787      +41     
- Partials      105      107       +2     

Impacted Files	Coverage Δ
...or/controllers/keptnworkloadinstance/controller.go	73.30% <60.29%> (-3.50%)	⬇️
operator/controllers/keptnappversion/controller.go	72.30% <65.85%> (ø)
operator/controllers/common/evaluationhandler.go	65.24% <81.72%> (-12.83%)	⬇️
operator/controllers/common/phasehandler.go	84.50% <84.61%> (+3.55%)	⬆️
operator/controllers/keptntask/controller.go	57.30% <0.00%> (+3.37%)	⬆️
...ptnworkloadinstance/reconcile_prepostdeployment.go	90.90% <0.00%> (+9.09%)	⬆️

Flag	Coverage Δ
component-tests	51.31% <59.39%> (+1.23%)	⬆️
scheduler	4.52% <ø> (ø)

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
7 Code Smells

No Coverage information
0.0% Duplication