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
List<ReadDetail> readDetails
        ) {
            this.nodeId = nodeId;
            this.nodeName = nodeName;
            this.blobName = blobName;
            this.blobLength = blobLength;
            this.readEarly = readEarly;
            this.overwrite = overwrite;
            this.checksumStart = checksumStart;
            this.checksumEnd = checksumEnd;
            this.writeElapsedNanos = writeElapsedNanos;
            this.overwriteElapsedNanos = overwriteElapsedNanos;
            this.writeThrottledNanos = writeThrottledNanos;
            this.readDetails = readDetails;
        }
        public Response(StreamInput in) throws IOException {
            super(in);
            nodeId = in.readString();
            nodeName = in.readString();
            blobName = in.readString();
            blobLength = in.readVLong();
            readEarly = in.readBoolean();
            overwrite = in.readBoolean();
            checksumStart = in.readVLong();
            checksumEnd = in.readVLong();
            writeElapsedNanos = in.readVLong();
            overwriteElapsedNanos = in.readVLong();
            writeThrottledNanos = in.readVLong();
            readDetails = in.readCollectionAsList(ReadDetail::new);
        }