tape/send_load_media_email: move to server/email_notifications

and reuse 'send_job_status_mail' there so that we get consistent
formatted mails from pbs (e.g. html part and author)

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

src/tape/changer/mod.rs

@@ -1,8 +1,5 @@
 //! Media changer implementation (SCSI media changer)
 
-mod email;
-pub use email::*;
-
 pub mod sg_pt_changer;
 
 pub mod mtx;