[timer.unit.j2] use wanted-by in timer unit (sonic-net#2546)

Signed-off-by: Stepan Blyschak <[email protected]>

Signed-off-by: Stepan Blyschak <[email protected]>

Author: stepanblyschak

sonic-utilities-data/templates/timer.unit.j2

@@ -13,3 +13,7 @@ Unit={{ manifest.service.name }}{% if multi_instance %}@%i{% endif %}.service
 
 [Install]
 WantedBy=timers.target sonic.target sonic-delayed.target
+{%- for service in manifest.service["wanted-by"] %}
+WantedBy={{ service }}{% if multi_instance and service in multi_instance_services %}@%i{% endif %}.service
+{%- endfor %}
+