public MongoDBSourceConfigFactory connectionOptions(String connectionOptions) {
        this.connectionOptions = connectionOptions;
        return this;
    }
Ampersand (i.e. &) separated MongoDB connection options eg
replicaSet=test&connectTimeoutMS=300000
https://docs.mongodb.com/manual/reference/connection-string/#std-label-connections-connection-options
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/mongodb-cdc/src/main/java/org/apache/inlong/sort/cdc/mongodb/source/config/MongoDBSourceConfigFactory.java