feat(lighthouse-service): Adapt readiness probe of lighthouse service to consider nats subscription

[bacherfl]

Part of #7613

Integration test run: https://github.com/keptn/keptn/actions/runs/2330206245

[codecov]

Codecov Report

Merging #7735 (7558fde) into master (b2ad6ad) will decrease coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #7735      +/-   ##
==========================================
- Coverage   59.91%   59.86%   -0.06%     
==========================================
  Files         562      562              
  Lines       32930    32936       +6     
  Branches     1590     1599       +9     
==========================================
- Hits        19730    19717      -13     
- Misses      11901    11917      +16     
- Partials     1299     1302       +3     

Impacted Files	Coverage Δ
lighthouse-service/event_handler/common.go	56.12% <100.00%> (+0.57%)	⬆️
...-service/event_handler/start_evaluation_handler.go	72.25% <100.00%> (+0.14%)	⬆️
...s/ktb-approval-item/ktb-approval-item.component.ts	40.00% <0.00%> (-20.00%)	⬇️
...ce-tasks-list/ktb-sequence-tasks-list.component.ts	40.00% <0.00%> (-12.31%)	⬇️
...omponents/ktb-task-item/ktb-task-item.component.ts	54.00% <0.00%> (-6.00%)	⬇️
...b-deployment-list/ktb-deployment-list.component.ts	54.71% <0.00%> (-5.67%)	⬇️
bridge/client/app/_utils/form.utils.ts	93.75% <0.00%> (-0.99%)	⬇️
...project-settings/ktb-project-settings.component.ts	79.09% <0.00%> (-0.57%)	⬇️
...b-evaluation-info/ktb-evaluation-info.component.ts	83.13% <0.00%> (-0.40%)	⬇️
...ews/ktb-service-view/ktb-service-view.component.ts	93.00% <0.00%> (-0.07%)	⬇️
... and 6 more

Flag	Coverage Δ
api	88.35% <ø> (ø)
approval-service	64.61% <ø> (ø)
bridge-server	67.62% <ø> (ø)
bridge2	73.74% <ø> (-0.27%)	⬇️
cli	43.04% <ø> (ø)
configuration-service	9.17% <ø> (ø)
distributor	70.75% <ø> (ø)
helm-service	49.07% <ø> (ø)
jmeter-service	25.29% <ø> (ø)
lighthouse-service	72.95% <100.00%> (+0.08%)	⬆️
mongodb-datastore	58.10% <ø> (ø)
remediation-service	79.77% <ø> (ø)
resource-service	81.37% <ø> (ø)
secret-service	82.53% <ø> (ø)
shipyard-controller	60.71% <ø> (ø)
statistics-service	59.29% <ø> (ø)
webhook-service	83.97% <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