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
private final String repositoryName;
        private final String blobPath;
        private final String blobName;
        private final long targetLength;
        private final long seed;
        private final List<DiscoveryNode> nodes;
        private final int readNodeCount;
        private final int earlyReadNodeCount;
        private final boolean readEarly;
        private final boolean writeAndOverwrite;
        private final boolean abortWrite;
        Request(
            String repositoryName,
            String blobPath,
            String blobName,
            long targetLength,
            long seed,
            List<DiscoveryNode> nodes,
            int readNodeCount,
            int earlyReadNodeCount,
            boolean readEarly,
            boolean writeAndOverwrite,
            boolean abortWrite
        ) {
            assert 0 < targetLength;
            assert targetLength <= MAX_ATOMIC_WRITE_SIZE || (readEarly == false && writeAndOverwrite == false) : "oversized atomic write";
            assert writeAndOverwrite == false || abortWrite == false : "cannot set writeAndOverwrite and abortWrite";
            this.repositoryName = repositoryName;
            this.blobPath = blobPath;