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
checksumEnd,
                    write1Details.elapsedNanos,
                    overwriteElapsedNanos,
                    write1Details.throttledNanos + overwriteThrottledNanos,
                    responses.stream()
                        .map(
                            nr -> new ReadDetail(
                                nr.node.getId(),
                                nr.node.getName(),
                                nr.beforeWriteComplete,
                                nr.response.isNotFound(),
                                nr.response.getFirstByteNanos(),
                                nr.response.getElapsedNanos(),
                                nr.response.getThrottleNanos()
                            )
                        )
                        .collect(Collectors.toList())
                )
            );
        }
        /**
         * @return random non-negative long in [min, max)
         */
        private long randomLongBetween(long min, long max) {
            assert 0 <= min && min <= max;
            final long range = max - min;
            return range == 0 ? min : min + (random.nextLong() & Long.MAX_VALUE) % range;
        }
    }
    private static class NodeResponse {