Required to support updation from 8 to 10

Bug, upstream: https://gitlab.com/gitlab-org/gitlab-ce/issues/48040

diff --git a/lib/gitlab/gitaly_client.rb b/lib/gitlab/gitaly_client.rb
index 0abae70c443..e4ff8261120 100644
--- a/lib/gitlab/gitaly_client.rb
+++ b/lib/gitlab/gitaly_client.rb
@@ -216,6 +216,12 @@ module Gitlab
       # Disabled features are always off!
       return false if status == MigrationStatus::DISABLED

+      # If the features table does not exist, don't check the feature, just return
+      # the default
+      unless Feature::FlipperFeature.table_exists?
+        return false
+      end
+
       feature = Feature.get("gitaly_#{feature_name}")

       # If the feature has been set, always evaluate