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/GetBlobChecksumAction.java
}
            }
            try {
                throttledInputStream.close();
            } catch (IOException e) {
                throw new RepositoryVerificationException(
                    request.repositoryName,
                    "failed to close input stream when handling [" + request.getDescription() + "]",
                    e
                );
            }
            final long endTimeNanos = System.nanoTime();
            if (request.isWholeBlob() == false && bytesRead != request.getRangeLength()) {
                throw new RepositoryVerificationException(
                    request.repositoryName,
                    "unexpectedly read [" + bytesRead + "] bytes when handling [" + request.getDescription() + "]"
                );
            }
            final Response response = new Response(
                bytesRead,
                crc32.getValue(),
                firstByteNanos - startTimeNanos,
                endTimeNanos - startTimeNanos,
                throttleNanos.get()
            );
            logger.trace("responding to [{}] with [{}]", request, response);
            listener.onResponse(response);
        }
    }
    public static class Request extends ActionRequest {