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
if (minClusterTransportVersion.onOrAfter(TransportVersions.UNCONTENDED_REGISTER_ANALYSIS_ADDED)) {
                    new UncontendedRegisterAnalysis(new Random(random.nextLong()), nodes, contendedRegisterAnalysisComplete).run();
                }
            }
            final List<Long> blobSizes = getBlobSizes(request);
            Collections.shuffle(blobSizes, random);
            for (int i = 0; i < request.getBlobCount(); i++) {
                final long targetLength = blobSizes.get(i);
                final boolean smallBlob = targetLength <= MAX_ATOMIC_WRITE_SIZE; 
                final boolean abortWrite = smallBlob && request.isAbortWritePermitted() && rarely(random);
                final BlobAnalyzeAction.Request blobAnalyzeRequest = new BlobAnalyzeAction.Request(
                    request.getRepositoryName(),
                    blobPath,
                    "test-blob-" + i + "-" + UUIDs.randomBase64UUID(random),
                    targetLength,
                    random.nextLong(),
                    nodes,
                    request.getReadNodeCount(),
                    request.getEarlyReadNodeCount(),
                    smallBlob && rarely(random),
                    repository.supportURLRepo() && repository.hasAtomicOverwrites() && smallBlob && rarely(random) && abortWrite == false,
                    abortWrite
                );
                final DiscoveryNode node = nodes.get(random.nextInt(nodes.size()));
                queue.add(ref -> runBlobAnalysis(ref, blobAnalyzeRequest, node));
            }
            ThrottledIterator.run(
                getQueueIterator(),
                (ref, task) -> task.accept(ref),
                request.getConcurrency(),