Add support for Config Override Inspector

I added all #config keys. I also moved the generation of the webhook hash to an install hook so that it's automatically generated during module install. Otherwise, if hiding the webhook hash field with COI, it would be regenerated every time the settings form loads.

Grouping these together for coi and the prime core issue.

Looks like WebhookHashTest needs updating since the hash now gets set upon installation.

I fixed the test. The failing tests are also failing on the dev branch.