Merge branch 'quar-load-balancing-custom-connection' into 'master'

Quarantine custom connection redirects queries to the right roles

See merge request gitlab-org/gitlab!185533



Merged-by: Leonardo da Rosa <ldarosa@gitlab.com>
Approved-by: Leonardo da Rosa <ldarosa@gitlab.com>
Co-authored-by: ichernikov <ichernikov@gitlab.com>

spec/lib/gitlab/database/load_balancing_spec.rb

@@ -535,7 +535,7 @@ def current_session
       end
 
       with_them do
-        it 'redirects queries to the right roles' do
+        it 'redirects queries to the right roles', quarantine: 'https://gitlab.com/gitlab-org/gitlab/-/issues/520708' do
           roles = []
 
           # If we don't run any queries, the pool may be a NullPool. This can