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::cleanUpAndReturnFailure
                                )
                            ),
                            this::cancelReadsCleanUpAndReturnFailure
                        )
                    ),
                    this::cancelReadsCleanUpAndReturnFailure
                )
            );
            task.addListener(() -> cancellableThreads.cancel(task.getReasonCancelled()));
        }
        void run() {
            writeRandomBlob(
                request.readEarly || request.getAbortWrite() || (request.targetLength <= MAX_ATOMIC_WRITE_SIZE && random.nextBoolean()),
                true,
                this::onLastReadForInitialWrite,
                write1Step
            );
            if (request.writeAndOverwrite) {
                assert request.targetLength <= MAX_ATOMIC_WRITE_SIZE : "oversized atomic write";
                dListener(
                    ActionListener.wrap(ignored -> writeRandomBlob(true, false, this::doReadAfterWrite, write2Step), ignored -> {})
                );
            e {
                write2Step.onResponse(null);
                doReadAfterWrite();
            }
        }
        private void writeRandomBlob(
            boolean atomic,