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/RepositoryAnalyzeAction.java
private final String repositoryName;
        private int blobCount = 100;
        private int concurrency = 10;
        private int readNodeCount = 10;
        private int earlyReadNodeCount = 2;
        private long seed = 0L;
        private double rareActionProbability = 0.02;
        private TimeValue timeout = TimeValue.timeValueSeconds(30);
        private ByteSizeValue maxBlobSize = ByteSizeValue.ofMb(10);
        private ByteSizeValue maxTotalDataSize = ByteSizeValue.ofGb(1);
        private boolean detailed = false;
        private DiscoveryNode reroutedFrom = null;
        private boolean abortWritePermitted = true;
        public Request(String repositoryName) {
            this.repositoryName = repositoryName;
        }
        public Request(StreamInput in) throws IOException {
            super(in);
            repositoryName = in.readString();
            seed = in.readLong();
            rareActionProbability = in.readDouble();
            blobCount = in.readVInt();
            concurrency = in.readVInt();
            readNodeCount = in.readVInt();
            earlyReadNodeCount = in.readVInt();
            timeout = in.readTimeValue();
            maxBlobSize = ByteSizeValue.readFrom(in);
            maxTotalDataSize = ByteSizeValue.readFrom(in);