Support "Delete" without "Create" management policy combinations

[tvandinther]

What problem are you facing?

In cases where a managed resource is intended to inherit an existing external resource and manage its full lifecycle, the only option for management policies is to include the "Create" policy. To protect against misconfigurations resulting in new resources being created instead of being adopted, it would be nice to be able to omit "Create" while maintaining destructive ownership with "Delete".

How could Crossplane help solve your problem?

Allow a more permission set of combinations. I made a similar request last year for allowing "Update" without "Create". At a minimum it would be nice to have "Delete" without "Create", but ultimately I don't see why there should be any restrictions on allowed combinations. A user could probably come up with a scenario where any combination of policies is desired, and Crossplane should just respect that.

[github-actions]

Crossplane does not currently have enough maintainers to address every issue and pull request. This issue has been automatically marked as stale because it has had no activity in the last 90 days. It will be closed in 14 days if no further activity occurs. Leaving a comment starting with /fresh will mark this issue as not stale.

[tvandinther]

/fresh