Move Kubernetes installation documentation from code/main to documentation project

changed milestone to %2024Q2

assigned to @ktrantzas

added to epic &4 (closed)

marked this issue as blocked by osl/code/org.etsi.osl.main#25 (closed)

mentioned in commit 4155aa5a

https://osl.etsi.org/documentation/develop/deploymentK8s/

closed