fix(operator): compute deployment interval on deployment endtime

[odubajDT]

Signed-off-by: odubajDT ondrej.dubaj@dynatrace.com

Fixes: #826

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

Merging #842 (1208b72) into main (8249de6) will decrease coverage by 0.07%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #842      +/-   ##
==========================================
- Coverage   58.63%   58.56%   -0.07%     
==========================================
  Files          97       97              
  Lines        7552     7552              
==========================================
- Hits         4428     4423       -5     
- Misses       2934     2937       +3     
- Partials      190      192       +2     

Impacted Files	Coverage Δ
operator/controllers/common/metrics.go	79.41% <100.00%> (ø)
...ptnworkloadinstance/reconcile_prepostdeployment.go	81.81% <0.00%> (-9.10%)	⬇️
...ptnworkloadinstance/reconcile_prepostevaluation.go	81.81% <0.00%> (-9.10%)	⬇️
...lers/lifecycle/keptnworkloadinstance/controller.go	81.61% <0.00%> (-0.90%)	⬇️
...ator/controllers/lifecycle/keptntask/controller.go	58.24% <0.00%> (+3.29%)	⬆️

Flag	Coverage Δ
component-tests	41.79% <0.00%> (ø)
keptn-lifecycle-operator	54.67% <100.00%> (ø)
klt-cert-manager	67.50% <ø> (ø)
scheduler	21.17% <ø> (ø)

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