Fix order-dependent Geo spec failure

Currently `before_all` doesn't rollback data properly between examples
when the data is in the Geo tracking database. We use `before` instead
of `before_all` to avoid polluting data data across examples.

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/230333

ee/spec/support/shared_examples/models/concerns/replicator_shared_examples.rb

@@ -23,7 +23,7 @@ RSpec.shared_examples 'a replicator' do
     context 'on a secondary node' do
       let_it_be(:registry_factory) { registry_factory_name(described_class.registry_class) }
 
-      before_all do
+      before do
         create(registry_factory, :synced)
         create(registry_factory)
         create(registry_factory, :failed)