feat: add metadata to helm chart

[mowies]

This PR

• adds helm and artifacthub metadata to the KLT helm chart
• some annotations were omitted because they are too much effort and would need to be updated manually:
  • CRDs
  • CRD examples

Fixes #596

[codecov]

Codecov Report

Merging #737 (caecc7b) into main (bc75f00) will increase coverage by 0.05%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #737      +/-   ##
==========================================
+ Coverage   57.69%   57.75%   +0.05%     
==========================================
  Files          91       91              
  Lines        7243     7243              
==========================================
+ Hits         4179     4183       +4     
+ Misses       2894     2891       -3     
+ Partials      170      169       -1     

Impacted Files	Coverage Δ
...lers/lifecycle/keptnworkloadinstance/controller.go	82.80% <0.00%> (+1.80%)	⬆️

Flag	Coverage Δ
component-tests	48.40% <ø> (-0.58%)	⬇️
keptn-lifecycle-operator	53.60% <ø> (ø)
klt-cert-manager	67.50% <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