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/UncontendedRegisterAnalyzeAction.java
this.containerPath = containerPath;
            this.registerName = registerName;
            this.expectedValue = expectedValue;
        }
        public Request(StreamInput in) throws IOException {
            super(in);
            assert in.getTransportVersion().onOrAfter(TransportVersions.UNCONTENDED_REGISTER_ANALYSIS_ADDED);
            repositoryName = in.readString();
            containerPath = in.readString();
            registerName = in.readString();
            expectedValue = in.readVLong();
        }
        @Override
        public void writeTo(StreamOutput out) throws IOException {
            assert out.getTransportVersion().onOrAfter(TransportVersions.UNCONTENDED_REGISTER_ANALYSIS_ADDED);
            super.writeTo(out);
            out.writeString(repositoryName);
            out.writeString(containerPath);
            out.writeString(registerName);
            out.writeVLong(expectedValue);
        }
        @Override
        public ActionRequestValidationException validate() {
            return null;
        }
        public String getRepositoryName() {
            return repositoryName;
        }
        public String getContainerPath() {
            return containerPath;