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
this.blobName = blobName;
            this.targetLength = targetLength;
            this.seed = seed;
            this.nodes = nodes;
            this.readNodeCount = readNodeCount;
            this.earlyReadNodeCount = earlyReadNodeCount;
            this.readEarly = readEarly;
            this.writeAndOverwrite = writeAndOverwrite;
            this.abortWrite = abortWrite;
        }
        Request(StreamInput in) throws IOException {
            super(in);
            repositoryName = in.readString();
            blobPath = in.readString();
            blobName = in.readString();
            targetLength = in.readVLong();
            seed = in.readLong();
            nodes = in.readCollectionAsList(DiscoveryNode::new);
            readNodeCount = in.readVInt();
            earlyReadNodeCount = in.readVInt();
            readEarly = in.readBoolean();
            writeAndOverwrite = in.readBoolean();
            if (in.getTransportVersion().onOrAfter(TransportVersions.V_7_14_0)) {
                abortWrite = in.readBoolean();
            e {
                abortWrite = false;
            }
        }
        @Override
        public void writeTo(StreamOutput out) throws IOException {