Add Kiali cleanup script to 2.3-2.4 migration guide (#14728)
Add Kiali cleanup script to 2.3-2.4 migration guide (#14728)

* Add Kiali cleanup script to 2.3-2.4 migration guide

* Update docs/migration-guide-2.3-2.4.md

Co-authored-by: Klaudia Grzondziel <061b7484c464fc4e583c427a028afc8ee730f897@users.noreply.github.com>

* Update docs/migration-guide-2.3-2.4.md

Co-authored-by: Klaudia Grzondziel <061b7484c464fc4e583c427a028afc8ee730f897@users.noreply.github.com>

* Add missing heading

Co-authored-by: Klaudia Grzondziel <061b7484c464fc4e583c427a028afc8ee730f897@users.noreply.github.com>
kyma-project/kyma,kyma-project/kyma,kyma-project/kyma,kyma-project/kyma