Simplify kubernetes integration test names

Hannes Hörlrequested to merge
hhoerl/k8s-integration-test-names into main

What does this MR do?

Simplify kubernetes integration test names

Why was this MR needed?

Makes it easier to target specific tests with -skip/-run

Makes the test names shorter and easier to digest

What's the best way to test this MR?

go test -tags integration,kubernetes -v -run TestRunIntegrationTestsWithFeatureFlag ./executors/kubernetes/

What are the relevant issue numbers?

n/a

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