Adds cluster_for_group factory for convienencegroup_with_cluster_factory

Also means we don't have to resort to an update statement to set parent
for child groups who also have clusters.

This is much shorter than

```
create(:cluster, :provided_by_gcp, :group, groups: [group])
```

1 files changed, 2 insertions, 0 deletions

diff --git a/spec/factories/clusters/clusters.rb b/spec/factories/clusters/clusters.rb
index ab332fc238b..171f5256d2b 100644
--- a/spec/factories/clusters/clusters.rb
+++ b/spec/factories/clusters/clusters.rb
@@ -5,6 +5,8 @@ FactoryBot.define do
     cluster_type :project_type
     managed true
 
+    factory :cluster_for_group, traits: [:provided_by_gcp, :group]
+
     trait :instance do
       cluster_type { Clusters::Cluster.cluster_types[:instance_type] }
     end