public Builder<T> 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-v1.15/sort-connectors/mongodb-cdc/src/main/java/org/apache/inlong/sort/mongodb/MongoDBSource.java