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
@Override
            public void onResponse(Void unused) {
                
            }
            @Override
            public void onFailure(Exception e) {
                assert e instanceof ElasticsearchTimeoutException : e;
                if (isRunning()) {
                    
                    setFirstFailure(
                        new RepositoryVerificationException(
                            request.repositoryName,
                            "analysis timed out after [" + request.getTimeout() + "]"
                        )
                    );
                }
            }
        }
        public void run() {
            assert queue.isEmpty() : "must only run action once";
            assert failure.get() == null : "must only run action once";
            logger.info("running analysis of repository [{}] using path [{}]", request.getRepositoryName(), blobPath);
            cancellationListener.addTimeout(request.getTimeout(), repository.threadPool(), EsExecutors.DIRECT_EXECUTOR_SERVICE);