### Elasticsearch Version

master

### Installed Plugins

N/A

### Java Version

_bundled_

### OS Version

N/A

### Problem Description

@arteam [observed](https://github.com/elastic/elasticsearch/pull/83221/files#r795474431) that `static record` is redundant, records are apparently implicitly static. I think we should make sure that Checkstyle picks this up rather than needing human involvement.

### Steps to Reproduce

Mark a record declaration as `static` and observe that `./gradlew precommit` still passes.

### Logs (if relevant)

_No response_
server/src/main/java/org/elasticsearch/cluster/routing/IndexRouting.java
private final List<String> routingPaths;
        private final XContentParserConfiguration parserConfig;
        ExtractFromSource(IndexMetadata metadata) {
            super(metadata);
            if (metadata.isRoutingPartitionedIndex()) {
                throw new IllegalArgumentException("routing_partition_size is incompatible with routing_path");
            }
            this.routingPaths = metadata.getRoutingPaths();
            this.parserConfig = XContentParserConfiguration.EMPTY.withFiltering(Set.copyOf(routingPaths), null, true);
        }