Read K8s version from lifecycle-manager versions.yaml

[c-pius]

Description

Runtime-watcher uses outdated k8s version for envtest that needs to be bumped. Let's try to read it from lifecycle-manager versions.yaml for alignment.

https://github.com/kyma-project/template-operator/blob/main/Makefile#L4

Reasons

Tooling alignment

AC

• checked for other tooling versions in the repo that can be aligned
• versions.yaml single source of truth for all tooling