[elastic][tests]❌ `cluster_name` service check tag (#2826)
[elastic][tests]❌ `cluster_name` service check tag (#2826)

`cluster_name` tag was removed from service checks in
https://github.com/DataDog/dd-agent/commit/d4c3d76d4ca20414d219957bbb8edfdf1ca46211
Wattpad/dd-agent,takus/dd-agent,jyogi/purvar-agent,jyogi/purvar-agent,takus/dd-agent,jyogi/purvar-agent,cberry777/dd-agent,manolama/dd-agent,takus/dd-agent,manolama/dd-agent,Wattpad/dd-agent,Wattpad/dd-agent,manolama/dd-agent,cberry777/dd-agent,manolama/dd-agent,cberry777/dd-agent,cberry777/dd-agent,jyogi/purvar-agent,Wattpad/dd-agent,takus/dd-agent,manolama/dd-agent,takus/dd-agent,cberry777/dd-agent,jyogi/purvar-agent,Wattpad/dd-agent