Correct path to cluster health partial

Closes gitlab-ee#10990

See merge request gitlab-org/gitlab-ce!27107

(cherry picked from commit 94d9de69)

bf611f3e Correct path to cluster health partial
c52946eb Add helper to check clusters/_health conditional
d3430fbd Rename clusters/health partial
7dbb5d64 Move helper to ee
51b8d34f Pass cluster as parameter to helper