Fix backup_retention_policy:set attribute handling

[joshraker]

Using **options to create a backup retention policy was working but it seems un unexpected dependency change broke it.

Also, overall option usage has changed:

At least one attribute must be specified.

❯ aptible backup_retention_policy:set josh-r-brp
Please specify at least one attribute to change

If the environment does not have a custom backup retention policy, all attributes must be specified.

❯ aptible backup_retention_policy:set josh-r-brp --daily 1 --make-copy
Environemnt josh-r-brp does not have a custom backup retention policy. Please specify all attributes to create one.

❯ aptible backup_retention_policy:set josh-r-brp --daily 3 --monthly 2 --yearly 1 --no-make-copy --keep-final
Id: 6873
Daily: 3
Monthly: 2
Yearly: 1
Make Copy: false
Keep Final: true
Environment: josh-r-brp

Otherwise, only the attributes to be changed need to be specified.

❯ aptible backup_retention_policy:set josh-r-brp --daily 10 --make-copy
Id: 6876
Daily: 10
Monthly: 2
Yearly: 1
Make Copy: true
Keep Final: true
Environment: josh-r-brp

[joshraker]

https://app.shortcut.com/aptible/story/25228/update-backup-retention-policy-defaults