Changes to GET /v1/:parent/hooks

removed the media type */* for the response with the status 200

the security scope https://www.googleapis.com/auth/cloud-platform was added to the endpoint's security scheme Oauth2

the security scope https://www.googleapis.com/auth/cloud-platform was added to the endpoint's security scheme Oauth2c

the security scope https://www.googleapis.com/auth/securesourcemanager.read-write was removed from the endpoint's security scheme Oauth2

the security scope https://www.googleapis.com/auth/securesourcemanager.read-write was removed from the endpoint's security scheme Oauth2c

added the new PULL_REQUEST_COMMENT enum value to the hooks/items/events/items response property for the response status 200

added the optional property hooks/items/serviceAccountAuth to the response with the 200 status