Revert "Simplify replica set creation in CI"

This partially reverts commit 203160e. The simplified call unfortunately breaks tests.

.github/workflows/build-ci.yml

@@ -61,7 +61,7 @@ jobs:
  until docker exec --tty mongodb mongo 127.0.0.1:27017 --eval "db.runCommand({ ping: 1 })"; do
  sleep 1
  done
- sudo docker exec --tty mongodb mongo 127.0.0.1:27017 --eval "rs.initiate()"
+ sudo docker exec --tty mongodb mongo 127.0.0.1:27017 --eval "rs.initiate({\"_id\":\"rs\",\"members\":[{\"_id\":0,\"host\":\"127.0.0.1:27017\" }]})"
  - name: "Installing php"
  uses: shivammathur/setup-php@v2
  with: