Add uploading OVN backups to Ceph Swift API gateway

[awfabian-rs]

JIRA:OSPC-341

[awfabian-rs]

Currently in draft status to:

1. See how the CronJob runs on my test cluster when the cron job time happens.
   • which I will check tomorrow
   • but I do expect it to work, since I tried the pod template in the CronJob independently of a CronJob already
2. Look at Use HashiCorp Vault for OSH deployment #151 as an example and see if we can use Vault here.

[awfabian-rs]

• I modified this to use a Ceph Swift API gateway because we do our SJC database MariaDB backups to that.
• I tested this on the DFW environment.
• I moved a few things out into separate files and used some kustomize generators
  • It seems easier to read ovn-backup.sh as a stand-alone file.
  • The ovn-backup-config patch almost completely duplicated the ConfigMap in the main file, and it just sets environment variables anyway, so I used a kustomize ConfigMap generator to just put the key-value pairs into a ConfigMap.
• I have an intermediate WIP commit. You will probably want to 'squash merge' this.

Feel free to merge if it looks ready to you. Please review and let me know any change(s) needed.