enhance clickhouse support (#4957)

client-adapter/launcher/src/main/resources/application.yml

@@ -104,3 +104,13 @@ canal.conf:
 #          jdbc.url: jdbc:phoenix:127.0.0.1:2181:/hbase/db
 #          jdbc.username:
 #          jdbc.password:
+#      - name: clickhouse
+#        key: clickhouse1
+#        properties:
+#          jdbc.driverClassName: ru.yandex.clickhouse.ClickHouseDriver
+#          jdbc.url: jdbc:clickhouse://127.0.0.1:8123/default
+#          jdbc.username: default
+#          jdbc.password: 123456
+#          batchSize: 3000
+#          scheduleTime: 600   # second unit
+#          threads: 3          # parallel threads