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
private final int blobCount;
        private final long maxTotalBytes;
        private final List<Long> blobSizes;
        private final int sizeCount;
        private final int[] blobsBySize;
        private long totalBytes;
        private int totalBlobs;
        BlobCountCalculator(int blobCount, long maxTotalBytes, List<Long> blobSizes) {
            this.blobCount = blobCount;
            this.maxTotalBytes = maxTotalBytes;
            assert blobCount <= maxTotalBytes;
            this.blobSizes = blobSizes;
            sizeCount = blobSizes.size();
            assert sizeCount > 0;
            blobsBySize = new int[sizeCount];
            assert invariant();
        }
        List<Long> calculate() {
            
            addBlobsRoughlyEvenly(sizeCount - 1);