Add discoverability for triggers in provider.yaml

[eladkal]

This PR adds/simplify the usage of notifications & triggers in provider.yaml by making their definition the same as operators/hooks

related: #31443
related: #29918

[eladkal]

i think this check is not needed. It was aim to do the same as with check_hook_classes function but this function is to tests the connections of the hook. This is why we have it only for hooks.
I removed this function and renamed check_hook_classes to check_hook_connection_classes to avoid future confusion.

[potiuk]

Yes. That should be enough

[potiuk]

Can you please close this PR @eladkal and push your branch (and create new PR) from apache repository instead of your own repo? I believe the reason for the problem in this PR is that validation schema used in this PR is the old one. I am not sure why exactly, but if you can push it to theapache repo, it should go a bit different path and it would validate my suspicion.

[potiuk]

Ah. No. the explanation is simpler. You need to also update provider_info.schema.json @eladkal and it unfortunately means that it cannot be implemented this way without breaking compatibility.

The "notification" object type has been added here: #29191 and relased in 2.6.0. The "provider_info" schema (unlike the provider.yaml" one ) is public-facing. Airflow expects the `provider_info" exposed by get_provider_info endpoint to conform to this schema. And it means that Airflow 2.6.* will not validate the provider_info properly.

So this change will have to be done differently if we decide to do it. For example you could change the field from "notifications" to "airflow-notifications" and deprecate the "notifications" one. But it would be quite complex to implement. I am not sure if it is worth it.

[eladkal]

@potiuk I can limit this PR to modify only the triggers and recheck later on the notifications.
would that work for you?

[potiuk]

Yep.

[eladkal]

Work as expected. It found entries merged yesterday that were missing:

Found 1 errors in providers
Error: Incorrect content of key 'triggers/python-modules' in file: airflow/providers/amazon/provider.yaml
      -- Items in the left set but not the right:
         'airflow.providers.amazon.aws.triggers.glue'
         'airflow.providers.amazon.aws.triggers.glue_crawler'

[eladkal]

@potiuk i think we are set here