[DEV-4025] fix(ruby): wait until ch is ready

Author: Nelfimov

.github/workflows/reusable-ruby-publish-migrated-db.yaml

@@ -196,6 +196,12 @@ jobs:
           --ulimit nofile=262144:262144 \
           clickhouse/clickhouse-server
           docker cp ./config/clickhouse-config.xml clickhouse:/etc/clickhouse-server/config.xml
+          timeout 20s bash -c '
+            until curl -fsS http://localhost:8123/ping | grep -qx "Ok."; do
+              sleep 1
+            done
+          '
+          curl -fsS http://localhost:8123/ --data-binary "SELECT version()"
 
       - name: Run clickhouse migrations
         run: |