Merge branch 'namespace-find-pages-host-by-path' into 'master'

Lookup namespace by pages host using find_by_path

See merge request gitlab-org/gitlab!25585

app/models/namespace.rb

@@ -130,7 +130,7 @@ class Namespace < ApplicationRecord
       return unless host.ends_with?(gitlab_host)
 
       name = host.delete_suffix(gitlab_host)
-      Namespace.find_by_full_path(name)
+      Namespace.find_by_path(name)
     end
 
     # overridden in ee