Make campaignion_newsletters independent of any CRM.

- Use WebformSubmission directly as $source.
- Check that the CRM is available before using it.
- If both sources are available - use a new CombinedSource class.
Make campaignion_newsletters independent of any CRM.

- Use WebformSubmission directly as $source.
- Check that the CRM is available before using it.
- If both sources are available - use a new CombinedSource class.
[cleverreach] Make 'ERROR 20: No data found.' an persistent error.
Don't deactivate dependencies.