deps: update kubernetes packages to v0.28.15 (patch) #637

Job	Run time
Prepare CI Run	6s
Store tag of the built images	4s
Unit Tests (lifecycle-operator, lifecycle-operator/)	1m 15s
Unit Tests (metrics-operator, metrics-operator/)	1m 0s
Build Docker Image (lifecycle-operator, lifecycle-operator/)	57s
Unit Tests (scheduler, scheduler/)	1m 16s
Build Docker Image (metrics-operator, metrics-operator/)	43s
Build Docker Image (scheduler, scheduler/)	1s
Build Docker Image (deno-runtime, runtimes/deno-runtime/)	1s
Unit Tests (certificate-operator, keptn-cert-manager/)	26s
Build Docker Image (python-runtime, runtimes/python-runtime/)	24s
Build Docker Image (certificate-operator, keptn-cert-manager/)	1s
Component Tests / Component Tests	39s
Integration Tests	0s
Performance Tests	0s
End to End Tests	0s
Load Tests	0s
Publish helm chart changes to charts repo	0s
	6m 53s

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