`NodeInfoPath.repo` should be optional

[swallez]

Reported in https://discuss.elastic.co/t/how-to-get-details-from-nodes-api-with-java-client/305732

[MrUmnyj]

I found this bug in 7.17.9 version too.
The method given by the link https://www.elastic.co/guide/en/elasticsearch/client/java-api-client/current/missing-required-property.html is not working because on the co.elastic.clients.elasticsearch.nodes.info.NodeInfoPath#NodeInfoPath this.repo set a value from ApiTypeHelper.unmodifiableRequired, but builder.repo is null, and there is NPE error.
Please fix this bug in 7.17 and 8 versions.

[MrUmnyj]

But if we give information without "settings", there is no parsing error.
We can use metrics: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/cluster-nodes-info.html .
For example:

NodesInfoRequest nodesInfoRequest = NodesInfoRequest.of(n -> n.metric("jvm", "os"))
NodesInfoResponse nodesInfoResponse = elasticClient.nodes().info(nodesInfoRequest)

[l-trotta]

fixed as part of elastic/elasticsearch-java#745