feat: set default of 1 for KeptnApp revision field

[mowies]

This PR

• sets a default of 1 if the KeptnApp revision field is not set

[codecov]

Codecov Report

Merging #513 (84878e9) into main (647c6a1) will increase coverage by 0.01%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #513      +/-   ##
==========================================
+ Coverage   48.76%   48.78%   +0.01%     
==========================================
  Files          55       55              
  Lines        5143     5143              
==========================================
+ Hits         2508     2509       +1     
+ Misses       2528     2527       -1     
  Partials      107      107              

Impacted Files	Coverage Δ
operator/api/v1alpha2/keptnapp_types.go	91.66% <ø> (ø)
...ptnworkloadinstance/reconcile_prepostevaluation.go	81.81% <0.00%> (-9.10%)	⬇️
...or/controllers/keptnworkloadinstance/controller.go	77.31% <0.00%> (+0.51%)	⬆️
...ptnworkloadinstance/reconcile_prepostdeployment.go	90.90% <0.00%> (+9.09%)	⬆️

Flag	Coverage Δ
component-tests	51.85% <ø> (+1.77%)	⬆️
keptn-lifecycle-operator	47.27% <ø> (ø)
scheduler	4.52% <ø> (ø)

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication