feat: add aggregation field in KeptnMetric

[rakshitgondwal]

Fixes #1779

Changes made:

• Added a new field in the KeptnMetric struct.
• Values accepted for this field: p90, p95, p99, max, min, median, avg.
• If range.step is not defined and range.aggregation is defined, a field.Required error would be shown.
• If range.aggregation is not defined and range.step is defined, a field.Required error would be shown.

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[codecov]

Codecov Report

Merging #1780 (9c506c2) into main (ee2abea) will increase coverage by 0.10%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1780      +/-   ##
==========================================
+ Coverage   63.57%   63.67%   +0.10%     
==========================================
  Files         143      143              
  Lines       10937    10957      +20     
==========================================
+ Hits         6953     6977      +24     
+ Misses       3722     3719       -3     
+ Partials      262      261       -1     

Files Changed	Coverage Δ
metrics-operator/api/v1alpha3/keptnmetric_types.go	100.00% <ø> (ø)
...trics-operator/api/v1alpha3/keptnmetric_webhook.go	94.87% <100.00%> (+1.76%)	⬆️

... and 1 file with indirect coverage changes

Flag	Coverage Δ
certificate-operator	68.55% <ø> (ø)
component-tests	58.95% <ø> (+0.81%)	⬆️
lifecycle-operator	84.91% <ø> (ø)
metrics-operator	83.02% <100.00%> (+0.29%)	⬆️
scheduler	32.12% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

[bacherfl]

Implementation wise this looks good! Can you please also update the CRD docs by executing the following command:

./.github/scripts/generate-crd-docs/generate-crd-docs.sh

Note: It seems like currently the workflow for checking whether the CRD docs are up to date is currently not executed. I created an issue for that in #1817 (this is of course out of scope for this PR)

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[bacherfl]

lgtm, great work!

[thisthat]

Well done 👏

[thisthat]

The failing html tests are not due to this PR :)

[rakshitgondwal]

Thank you for the merge!