[stable/2023.1] increase pxc operator cpu resources (#2278)

This is an automated cherry-pick of #2275
/assign mnaser
diff --git a/roles/percona_xtradb_cluster_operator/vars/main.yml b/roles/percona_xtradb_cluster_operator/vars/main.yml
index 0f13ba0..d7e48eb 100644
--- a/roles/percona_xtradb_cluster_operator/vars/main.yml
+++ b/roles/percona_xtradb_cluster_operator/vars/main.yml
@@ -16,3 +16,6 @@
   image: "{{ atmosphere_images['percona_xtradb_cluster_operator'] | vexxhost.kubernetes.docker_image('ref') }}"
   nodeSelector:
     openstack-control-plane: enabled
+  resources:
+    limits:
+      cpu: 500m