Allow creation of backups without delete-backup finalizers

[dcharbonnier]

Proposal

We should be able when enabling backups in PerconaServerMongoDb to choose the finalizers or at least to remove the delete-backup finalizer.

backup:
  enabled: true
  finalizers: false

or

backup:
  enabled: true
  finalizers: []

Use-Case

The credentials used to push a new backup (or even to retrieve them) should not be able to delete a backup as this would create a security bridge.
Most likely no-one is even able to delete a backup as enabling object-lock should be a standard practice.
This prevent the backup objects from being deleted without manually removing the useless finalizer in this case.

Is this a feature you are interested in implementing yourself?

No

Anything else?

No response