Allow to emit notifications for selected users from automate

[skateman]

If the audience of the notification is set to user, it is always being sent to the @workspace.ae_user and there's no possibility to notify e.g. the admin. A possible workaround would be to send the notification to the group of the admin user, however, this is not feasible as we're bound to notification types.

@pkomanek @d-m-u can you please take a look?

[ahrechushkin]

My case: I need to notify users when quotas are exceeded by sending messages to SUI

[miq-bot]

This issue has been automatically marked as stale because it has not been updated for at least 6 months.

If you can still reproduce this issue on the current release or on master, please reply with all of the information you have about it in order to keep the issue open.

Thank you for all your contributions!