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
+ targetLength
                + ", seed="
                + seed
                + ", readEarly="
                + readEarly
                + ", writeAndOverwrite="
                + writeAndOverwrite
                + ", abortWrite="
                + abortWrite
                + "]";
        }
        @Override
        public String toString() {
            return "BlobAnalyzeAction.Request{" + getDescription() + "}";
        }
        @Override
        public Task createTask(long id, String type, String action, TaskId parentTaskId, Map<String, String> headers) {
            return new CancellableTask(id, type, action, getDescription(), parentTaskId, headers);
        }
        public String getRepositoryName() {
            return repositoryName;
        }
        public String getBlobPath() {
            return blobPath;
        }
        public String getBlobName() {
            return blobName;
        }
        public long getTargetLength() {
            return targetLength;