New diagnose command to delete avatars (388634)

Commands to delete avatars by FortiClient UID or avatar name have been added to the CLI.

the two following commands has been added to diagnose endpoint avatar: l diagnose endpoint avatar delete <ftcl_uid> l diagnose endpoint avatar delete <ftcl_uid> <username>

The attribute delete did not exist before. The values <fctl_uid> and <user_name> describe a set of avatars. If only <fctl_uid> is defined, all avatars belonging to this FortiClient UID that are not being used will be removed. If both values are defined, the avatar belonging to them will be removed unless they are being used in which case this call will cause an error to user.