input: support for constraints and valid_values

[Trophime]

Hi,
would it be possible to support defining inputs that have a constrainted choice of values.

In TOSCA CSimple Profile in YAML version 1.0 they give an example in section 3.1.
I thougth that was supported by default :(

[Trophime]

it seems that these features are availble using the ARIA-TOSCA plugin: https://docs.cloudify.co/4.3.0/working_with/official_plugins/aria/
https://github.com/apache/incubator-ariatosca/blob/1f3e7ff42fefcd5dc8191e3b0eeac0460db059b0/examples/tosca-simple-1.0/use-cases/compute-1/compute-1.yaml

I wish I could test this but I have no idea on how to add a plugin?
@emepetres can I use imports as for cloudify-hpc-plugin?

[Trophime]

not possible actually mix Cloudify DSL and ARIA...