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
+ blobCount
                + ", concurrency="
                + concurrency
                + ", readNodeCount="
                + readNodeCount
                + ", earlyReadNodeCount="
                + earlyReadNodeCount
                + ", seed="
                + seed
                + ", rareActionProbability="
                + rareActionProbability
                + ", timeout="
                + timeout
                + ", maxBlobSize="
                + maxBlobSize
                + ", maxTotalDataSize="
                + maxTotalDataSize
                + ", detailed="
                + detailed
                + ", abortWritePermitted="
                + abortWritePermitted
                + "]";
        }
        public void reseed(long newSeed) {
            if (seed == 0L) {
                seed = newSeed;
            }
        }
    }
    public static class Response extends ActionResponse implements ToXContentObject {