Investigate cluster creation issues with cilium and monitoring enabled

Cluster creation with cilium as a cni and monitoring enabled fails. It fails at helm install stage with the error:

coalesce.go:220: warning: cannot overwrite table with non table for cern-magnum.openstack-cloud-controller-manager.controllerExtraArgs (map[]) Error: INSTALLATION FAILED: create: failed to create: Secret "sh.helm.release.v1.cern-magnum.v1" is invalid: data: Too long: must have at most 1048576 bytes