Actions `cluster:admin/repository/analyze/blob` and `cluster:admin/repository/analyze/register` and so on are only invoked via the transport service, they do not need to register as client actions so we can drop the `ActionType` instance. Instead the root `RepositoryAnalyzeAction` should create and register all these transport actions itself. But even the root `RepositoryAnalyzeAction` should not be an `ActionType` derivative, we should just declare an `ActionType` instance directly. Moreover we can use `ActionType#localOnly` since the client action does not run on remote clusters.
x-pack/plugin/snapshot-repo-test-kit/src/main/java/org/elasticsearch/repositories/blobstore/testkit/BlobAnalyzeAction.java
final DiscoveryNode node;
        final boolean beforeWriteComplete;
        final GetBlobChecksumAction.Response response;
        NodeResponse(DiscoveryNode node, boolean beforeWriteComplete, GetBlobChecksumAction.Response response) {
            this.node = node;
            this.beforeWriteComplete = beforeWriteComplete;
            this.response = response;
        }
    }
    private static class WriteDetails {
        final long bytesWritten;
        final long elapsedNanos;
        final long throttledNanos;
        final long checksum;
        private WriteDetails(long bytesWritten, long elapsedNanos, long throttledNanos, long checksum) {
            this.bytesWritten = bytesWritten;
            this.elapsedNanos = elapsedNanos;
            this.throttledNanos = throttledNanos;
            this.checksum = checksum;
        }
    }
    public static class Request extends ActionRequest {