Fix usage data and install command spec

lib/gitlab/usage_data.rb

@@ -60,6 +60,7 @@ module Gitlab
             clusters_platforms_user: count(::Clusters::Cluster.user_provided.enabled),
             clusters_applications_helm: count(::Clusters::Applications::Helm.installed),
             clusters_applications_ingress: count(::Clusters::Applications::Ingress.installed),
+            clusters_applications_cert_managers: count(::Clusters::Applications::CertManager.installed),
             clusters_applications_prometheus: count(::Clusters::Applications::Prometheus.installed),
             clusters_applications_runner: count(::Clusters::Applications::Runner.installed),
             clusters_applications_knative: count(::Clusters::Applications::Knative.installed),

spec/lib/gitlab/kubernetes/helm/install_command_spec.rb

@@ -207,6 +207,7 @@ describe Gitlab::Kubernetes::Helm::InstallCommand do
           --tls-ca-cert /data/helm/app-name/config/ca.pem
           --tls-cert /data/helm/app-name/config/cert.pem
           --tls-key /data/helm/app-name/config/key.pem
+          --set rbac.create\\=false,rbac.enabled\\=false
           --namespace gitlab-managed-apps
           -f /data/helm/app-name/config/values.yaml
         EOS