[SFS-1439] Implement custom sort for Unstructured

[biancasilvavtex]

Description

Within this PR, we're extending the CEL functions to include a way to sort lists. The new sort_by function can be used in the following way:

[3,1,2].sort_by(i, i) // returns [1,2,3]

[{Name: "c", Age: 10}, {Name: "a", Age: 30}, {Name: "b", Age: 1}].sort_by(obj, obj.age) // returns [{Name: "b", Age: 1}, {Name: "c", Age: 10}, {Name: "a", Age: 30}]

It supports all CEL types that implement the Comparer interface.

Additionally, we also include the Lists() capabilities from K8s extensions. So now we can use something like this:

[1,2,3,4].indexOf(2) // returns 1

What was done

• Create a package named custom_cel specific for the code related to CEL
• Implement the the logic responsible for sorting lists
• Implement tests for the new code
• Add Go docs for the new code
• Make k8s.io/apiserver a required dependency instead of indirect

Documentation

• [FastStore] Limiting Resources By Account

[cezar-guimaraes]

Great work @biancasilvavtex !
I'm approving the PR but there is one last change I requested to use slices.Reverse instead of implementing the reverse algorithm.

[sonarqubecloud]

Quality Gate passed

Issues
4 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud