default Map<String, List<StreamSource>> getSourcesMap(InlongGroupInfo groupInfo,
            List<InlongStreamInfo> streamInfos, List<StreamSource> streamSources) {
        return new HashMap<>();
    }
Get the StreamSource Map by the inlong group info and inlong stream info list.

@param groupInfo inlong group info
@param streamInfos inlong stream info list
@param streamSources stream source list
@return map of StreamSource list, key-inlongStreamId, value-StreamSourceList
@apiNote The MQ source which was used in InlongGroup must implement the method.
inlong-manager/manager-service/src/main/java/org/apache/inlong/manager/service/source/StreamSourceOperator.java