Ignore warnings and notices when running validation

[demeyerthom]

We currently fail a validation when the validation process returns notices. We should make sure that a notice is not breaking for the validation, but instead only logged as output of the terraform apply.

Optionally we might want to add some additional configs for the apollostudio_sub_graph_validation data source to be more strict and fail on notice, so we can support both

[demeyerthom]

@okkevandereijk Can you maybe clarify what is currently happening, and what is expected?

[okkevandereijk]

@demeyerthom We likely would like to have a way to explicility skip errors in our schema checking without blocking pipelines/releases. If you can clarify the options that would be great