App Config Schema for aio app pack is outdated

[moritzraho]

Describe the bug
The file should be taken from https://github.com/adobe/aio-cli-lib-app-config/blob/master/schema/app.config.yaml.schema.json

#682 is fixing this but it is still in discussion as it is a breaking change. It could be preferable to come up with an intermediate update just for the app pack command.

[aiojbot]

JIRA issue created: https://jira.corp.adobe.com/browse/ACNA-2443

[MichaelGoberling]

@moritzraho Is there an update on this? Was testing aio app install for the EQP checks and noticed it doesn't fail the app.config.yaml schema validation check for extensions. I think this is because the config files aren't coalesced before the schema is validated

[moritzraho]

@MichaelGoberling fixed in #723