Persisting projects directory

In cases which you want to persist the /var/lib/projects directory, there are few variables that are customizable for the awx-operator.

Name	Description	Default
projects_persistence	Whether or not the /var/lib/projects directory will be persistent	false
projects_storage_class	Define the PersistentVolume storage class	''
projects_storage_size	Define the PersistentVolume size	8Gi
projects_storage_access_mode	Define the PersistentVolume access mode	ReadWriteMany
projects_existing_claim	Define an existing PersistentVolumeClaim to use (cannot be combined with `projects_storage_*`)	''

Example of customization when the awx-operator automatically handles the persistent volume could be:

---
spec:
  ...
  projects_persistence: true
  projects_storage_class: rook-ceph
  projects_storage_size: 20Gi