feat: patch cas-schedule-active configmap instead of replacing

[Art3mK]

Hello!

I got a problem with current version, which force replaces cas-schedule-active configmap, cause I've deployed chart using argo cd. While configmap changes are configured to be ignored by argocd, force replacing (delete/create) forces argocd to sync originally deployed configmap, which overrides the configmap cronjob wants to create.

I got this script working fine with bitnami/kubectl:1.30 image, jq is missing from ghcr.io/codecentric/cluster-overprovisioner-helper:latest

yq in ghcr.io/codecentric/cluster-overprovisioner-helper:latest is acting weird giving me error for some reason, didn't bothered to investigate why, but this should do the same with yq, at least that works locally:

kubectl get cm "cas-schedule-{{- $schedule.name }}" -n "{{ $namespace }}" -o yaml | yq e '.data' - > /tmp/source_data.yaml
kubectl get cm "cas-schedule-active" -n "{{ $namespace }}" -o yaml | yq e '.data = load("/tmp/source_data.yaml")' - | kubectl apply -f -

Thanks!

[Art3mK]

ping @grieshaber