reindex.remote.whitelist is deprecated, replaced with reindex.remote.allowlist

https://github.com/Graylog2/graylog2-server/blob/73fcc70dbed9b047ecf9fc1382575893cc56411c/data-node/src/main/java/org/graylog/datanode/management/OpensearchProcessService.java#L114

I don't believe this is a problem and to my knowledge is not causing any issues but ran across this and wanted to note it.

See https://github.com/opensearch-project/OpenSearch/pull/2221

Per https://github.com/opensearch-project/OpenSearch/blob/ac0bb8344a2dcd0b1c251e450710801c78b6249f/modules/reindex/src/main/java/org/opensearch/index/reindex/TransportReindexAction.java#L61 both are still valid properties.