feat: fill in chart README

[RealAnna]

this PR

• adds data to helm chart README
• forces validation pipeline to have all image TAG to refer to the next version of the chart to be released

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[codecov]

Codecov Report

Merging #987 (247d780) into main (444ba74) will increase coverage by 0.15%.
The diff coverage is n/a.

❗ Current head 247d780 differs from pull request most recent head 3002da3. Consider uploading reports for the commit 3002da3 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #987      +/-   ##
==========================================
+ Coverage   57.38%   57.54%   +0.15%     
==========================================
  Files         119      120       +1     
  Lines        9914     9993      +79     
==========================================
+ Hits         5689     5750      +61     
- Misses       4027     4039      +12     
- Partials      198      204       +6     

Impacted Files	Coverage Δ
...ptnworkloadinstance/reconcile_prepostdeployment.go	81.81% <0.00%> (-9.10%)	⬇️
...ator/controllers/lifecycle/keptntask/controller.go	54.94% <0.00%> (-3.30%)	⬇️
.../controllers/lifecycle/keptnworkload/controller.go	67.08% <0.00%> (ø)
operator/controllers/common/evaluationhandler.go	79.71% <0.00%> (+2.17%)	⬆️
...lers/lifecycle/keptnworkloadinstance/controller.go	81.16% <0.00%> (+2.24%)	⬆️
...ptnworkloadinstance/reconcile_prepostevaluation.go	90.90% <0.00%> (+18.18%)	⬆️

Flag	Coverage Δ
certificate-operator	64.15% <ø> (ø)
component-tests	51.92% <ø> (+2.47%)	⬆️
lifecycle-operator	53.63% <ø> (ø)
metrics-operator	62.98% <ø> (ø)
scheduler	21.17% <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